| | | | | | | | | | | | Earl of Dorset (possible 1st creation), 1070 |
|
| | | | | | | | | | | | Saint Osmund
d. 1099
Bishop of Salisbury and possible Earl of Dorset | | | | | | Roger de Beaumont
c. 1015–1094 |
|
| | | | | | | | | | | | Earl of Dorset (1st creation) discontinued, 1099 | | | | | | | | | | | | | | |
| | | | |
| | | | | | | | | | | | | | | | | | | | Earl of Leicester (1st creation), 1107 | | | | | |
|
| | | | | | | | King Henry I
c. 1068–1135 | | King Stephen
1092/1096–1154 | | | | | | Robert de Beaumont
c. 1040/1050–1118
1st Earl of Leicester | | Henry de Beaumont
d. 1119
1st Earl of Warwick |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | |
| | | | | | | | | | | | | | | | | | Earl of Worcester (1st creation), 1138 | | | | | | | | | | | | | | |
|
| | | | | | | | Robert FitzRoy
c. 1090–1147
1st Earl of Gloucester | | Matilda
(d. bef. 1141) | | Waleran de Beaumont
1104–1166
Earl of Worcester | | Robert de Beaumont
1104–1168
2nd Earl of Leicester | | Hugh de Beaumont
b. 1106
1st Earl of Bedford | |
|
| | | | | | | | | | | | | | | | | Earldom of Worcester (1st creation) extinct, 1166 | | | | | |
|
| | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | |
| | | | | | | | William FitzRobert
1116–1183
2nd Earl of Gloucester | | | | | | Hawise de Beaumont | | Robert de Beaumont
d. 1190
3rd Earl of Leicester |
| | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | |
| | | | | | | | | | | | | | | | | | | | | Robert de Beaumont
d. 1204
4th Earl of Leicester | | Amice
Countess of Rochefort |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|
| | | | | | | | King John
1166–1216 | | Isabella
1173/1174–1217
Countess of Gloucester | | | | | | | | | | Simon de Montfort
c. 1175–1218
5th Earl of Leicester |
| |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | |
| | | | | | | | King Henry III
1207–1272 | | | | | | | | | | Eleanor of England | | Simon de Montfort
c. 1208–1265
6th Earl of Leicester |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Leicester (1st creation) forfeited, 1265 |
| | | | |
| | | | | | | | | | | | | Earl of Leicester (2nd creation), 1267
Earl of Lancaster, 1276 |
|
| | | | | | | | King Edward I
1239–1307 | | Edmund Crouchback
1245–1296
1st Earl of Leicester, 1st Earl of Lancaster |
|
| | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | Earldom of Leicester (1st creation) restored, 1324
Earldom of Lancaster restored, 1327 |
|
| | | | | | | | King Edward II
1284–1327 | | Thomas of Lancaster
1278–1322
2nd Earl of Leicester, 2nd Earl of Lancaster | | | | | | Henry of Lancaster
1281–1345
3rd Earl of Leicester, 3rd Earl of Lancaster |
|
| | | | | | | | | | | | | Earldom of Leicester (1st creation) forfeited, 1322
Earldom of Lancaster forfeited, 1322 | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | Duke of Lancaster, 1351 | | | | | | | | | | | | | | | | | | | | | | | |
|
| | | | | | | | King Edward III
1312–1377 | | | | | | Henry of Grosmont
c. 1310–1361
Duke of Lancaster, 4th Earl of Lancaster, 4th Earl of Leicester | | | | | | Joan of Lancaster
c. 1312–1349 | | John (II) de Mowbray
1310–1361
3rd Baron Mowbray | | Eleanor of Lancaster
1318–1372 | | Mary of Lancaster
c. 1320–1362 |
| |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earl of Worcester (2nd creation), 1397 |
| | | | | | | | | |
| | | | | | | | John of Gaunt
1340–1399
Duke of Lancaster, 5th Earl of Lancaster, (6th) Earl of Leicester jure uxoris | | Blanche of Lancaster
1342–1368 | | | | | | Maud of Lancaster
1340–1362
a.k.a. Matilda, Countess of Hainault | | William
1330–1389
Duke of Bavaria and Count of Holland,
(5th) Earl of Leicester jure uxoris | | | | | | | Richard Fitzalan
1346–1397
Earl of Arundel | | Thomas Percy
1343–1403
Earl of Worcester | |
| | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Worcester (2nd creation) extinct, 1403 |
| | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Roger La Warr
1326–1370 | | Eleanor Mowbray | | | | | |
| |
| | | | | | | | | | | | | | Earl of Somerset (1st creation), 1397
Marquess of Somerset and Marquess of Dorset (1st creation), 1397 | | Earl of Dorset (2nd creation), 1411 | | | | | | | | | | | | | | | | | | | | |
| | | | | | | |
| | | | | | | | Henry Bolingbroke
1367–1413
Duke of Lancaster, (7th) Earl of Leicester
King Henry IV | | John Beaufort
c. 1373–1410
Marquess of Somerset, Marquess of Dorset, 1st Earl of Somerset | | Thomas Beaufort
c. 1377–1426
Duke of Exeter, Earl of Dorset | | Joan Beaufort
c. 1379–1440 | | Joan La Warr | | Thomas West
1365–1405
1st Baron West | | Joan de Beauchamp
1375–1435 |
| |
| | | | | | | | Earldom of Leicester (2nd creation) and Dukedom of Lancaster merged into the Crown, 1399 | | Marquessate of Somerset and Marquessate of Dorset (1st creation) revoked, 1399 | | Earldom of Dorset (2nd creation) extinct, 1426 | | | | | | | | | | | | | | | | | | | | |
| | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|
| | | | | | | | Duke of Lancaster, 1399 | | | | | | | | | | | | | | | | | | | | | | | | | Earl of Worcester (3rd creation), 1421 |
|
| | | | | | | | Henry of Monmouth
1386–1422
Duke of Lancaster
King Henry V | | | | | | | | | | | | | | | | Reginald West
1395–1450
6th Baron De La Warr and 3rd Baron West | | | | | | Richard Beauchamp
(1394–c. 1422)
Earl of Worcester |
|
| | | | | | | | Dukedom of Lancaster merged into the Crown, 1413 | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Worcester (2nd creation) extinct, 1422 |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | Duke of Somerset (1st creation), 1443 | | | | | | Earl of Dorset (3rd creation), 1442
Marquess of Dorset (2nd creation), 1443
Duke of Somerset (2nd creation), 1448 | | | | | | | | | | | | | | | | | | | | | | | | |
|
Henry Beaufort
1401–1418
2nd Earl of Somerset | | John Beaufort
1404–1444
1st Duke of Somerset, 3rd Earl of Somerset | | | | | | Edmund Beaufort
1406–1455
2nd Duke of Somerset, 1st Marquess of Dorset, 4th Earl of Somerset, Earl of Dorset | | | | | | Richard Neville
1400–1460
Earl of Salisbury | | Richard West
1430–1476
7th Baron De La Warr and 4th Baron West | | Edward Neville
d. 1476
de facto 3rd (de jure 1st) Baron Bergavenny | | Elizabeth Beauchamp
1415–1448 |
|
| | | | Dukedom of Somerset (1st creation) extinct, 1444 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | | | | | | | | | | Claimed titles here are disputed | | | | | | | Earl of Worcester (4th creation), 1449 | | | | | |
|
| | | | Margaret Beaufort
1443–1509 | | Elizabeth Woodville
c. 1437–1492 | | Henry Beaufort
1436–1464
3rd Duke of Somerset, 2nd Marquess of Dorset, 5th Earl of Dorset | | Edmund Beaufort
c. 1438–1471
4th Duke of Somerset, 3rd Marquess of Dorset, 6th Earl of Dorset | | Cecily Neville
c. 1425–1450 | | John Tiptoft
1427–1470
1st Earl of Worcester | | | | | |
|
| | | | | | | | | | | | | | Dukedom of Somerset (2nd creation), Marquessate of Dorset (2nd creation), and Earldom of Dorset attained, 1461, but possibly restored (disputed), 1463 | | Dukedom of Somerset (2nd creation), Marquessate of Dorset (2nd creation), and Earldom of Dorset extinct, 1471 | | | | | | Earldom of Worcester (4th creation) attainted, 1470 | | | | | |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Thomas West
c. 1457–1525
8th Baron De La Warr and 5th Baron West |
| | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | |
| | | | | | | | | | | | | | Marquess of Dorset (3rd creation), 1475 | | Earl of Worcester (5th creation), 1514 | | | | | | Earl of Worcester (4th creation) restored, 1471 | | | | | |
|
Margery Wentworth
c. 1478–1550 | | King Henry VII
1457–1509 | | Elizabeth of York
1466–1503 | | Thomas Grey
1451–1501
1st Marquess of Dorset | | Charles Somerset
c. 1460–1526
1st Earl of Worcester | | Elizabeth Somerset
c. 1476–1507
3rd Baroness Herbert suo jure | | Edward Tiptoft
c. 1469–1485
2nd Earl of Worcester | | Eleanor West
b. 1481 | | Edward Guildford
c. 1474–1534 |
| | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Worcester (4th creation) extinct, 1485 | | | | | | | |
| | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Viscount Beauchamp "of Hache" (1st creation), 1536
Earl of Hertford (2nd creation), 1537
Duke of Somerset (4th creation), 1547 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Duke of Somerset (3rd creation), 1499 |
| | | | | | | | |
Edward Seymour
c. 1500–1552
1st Duke of Somerset, 1st Earl of Hertford and Viscount Beauchamp | | Jane Seymour
c. 1508–1537 | | King Henry VIII
1491–1547 | | Thomas Grey
1477–1530
2nd Marquess of Dorset | | Henry Somerset
c. 1495–1548
2nd Earl of Worcester, 4th Baron Herbert | | John Dudley
1504–1553
Duke of Northumberland | | Jane Guildford
c. 1508/1509–1555 | | Mary Tudor
1496–1533
Queen of France
Duchess of Suffolk | | Prince Edmund
1499–1500
1st Duke of Somerset |
| | | |
| Dukedom of Somerset (4th creation), Earldom of Hertford (2nd creation), and Viscountcy Beauchamp (1st creation) forfeit, 1552 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Dukedom of Somerset (3rd creation) extinct, 1500 |
| | | | | | | | | | | | | | | | | | |
| | | | | | | | | | Duke of Richmond and Somerset, 1525 | | | | | | | | | | | | | | | | | | | | | | | | |
|
| | | | | King Edward VI
1537–1553 | | Henry Fitzroy
1519–1536
1st Duke of Richmond and Somerset | | | | | | | | | | | | | | | | Henry Grey
1517–1554
Duke of Suffolk
3rd Marquess of Dorset | | Lady Frances Brandon
1517–1559
Duchess of Suffolk |
| |
| | | | | | | | | | Dukedom of Richmond and Somerset extinct, 1536 | | | | | | | | | | | | | | | | Marquessate of Dorset (3rd creation) attainted and honours forfeit, 1554 | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | |
| | | | | Earl of Hertford (3rd creation) reverted, 1559 | | | | | | | | | | | | | | | | | | | | | Earl of Leicester (3rd creation), 1564 | | | | | | | | | | | | | | | | | Baron Buckhurst of Buckhurst in the County of Sussex (1st creation), 1567
Earl of Dorset (4th creation), 1604 |
|
Edward Seymour
c. 1528–1593 | | Edward Seymour
1539–1621
1st Earl of Hertford | | | | | | Katherine Grey
1540–1568 | | William Somerset
c. 1526–1589
3rd Earl of Worcester, 5th Baron Herbert | | John Dudley
c. 1527–1554
Earl of Warwick | | Robert Dudley
1532–1588
1st Earl of Leicester | | Mary Dudley
d. 1586
m. Henry Sidney | | Lord Guildford Dudley
c. 1535–1554 | | Lady Jane Grey
1537–1554
Disputed Queen of England | | Thomas Sackville
1536–1608
1st Earl of Dorset, 1st Baron Buckhurst |
| | | | | | |
| | | | | Earldom of Hertford (3rd creation) forfeit, 1552 | | | | | | | | | | | | | | | | | | | | Earldom of Leicester (3rd creation) extinct, 1588 | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earl of Leicester (4th creation), 1618 | | | | | | | | | |
|
Edward Seymour
c. 1563–1613
1st Baronet | | | | | | Edward Seymour
1561–1612
Viscount Beauchamp | | | | | | Edward Somerset
1553–1628
4th Earl of Worcester, 6th Baron Herbert | | | | | | Philip Sidney
1554–1586 | | Mary Sidney
1561–1621 | | Robert Sidney
1563–1626
1st Earl of Leicester | | | | | | Robert Sackville
1561–1609
2nd Earl of Dorset, 2nd Baron Buckhurst |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | |
| | | | | Marquess of Hertford (1st creation), 1641
Duke of Somerset (4th creation restored), 1660 | | Baron Seymour of Trowbridge, 1641 | | Viscount Rochester, 1611
Earl of Somerset (3rd creation), 1613 | | Marquess of Worcester, 1642 | | Viscount Somerset of Cashel, 1626 | | | | | | | | | | | | | | | | | | | | | | | |
|
Edward Seymour
c. 1580–1659
2nd Baronet | | William Seymour
1588–1660
3rd Duke of Somerset, 1st Marquess of Hertford, 2nd Earl of Hertford | | Francis Seymour
c. 1590–1664
1st Lord Seymour of Trowbridge | | Robert Carr
c. 1587–1645
Earl of Somerset | | Henry Somerset
1577–1646
1st Marquess of Worcester, 5th Earl of Worcester, 7th Baron Herbert | | Thomas Somerset
1579–1651
Viscount Somerset | | | | | | | | | | Robert Sidney
1595–1677
2nd Earl of Leicester | | Richard Sackville
1589–1624
3rd Earl of Dorset, 3rd Baron Buckhurst | | Edward Sackville
1591–1652
4th Earl of Dorset, 4th Baron Buckhurst |
|
| | | | | | | | | | | | | | | | Earldom of Somerset (3rd creation) and Viscountcy Rochester extinct, 1645 | | | | | | | Viscountcy Somerset extinct, 1651 | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | |
Edward Seymour
1610–1688
3rd Baronet | | Henry Seymour
c. 1626–1654
Lord Beauchamp | | | Charles Seymour
c. 1621–1665
2nd Lord Seymour of Trowbridge | | | | | | Edward Somerset
1601–1667
2nd Marquess of Worcester, 6th Earl of Worcester, 8th Baron Herbert | | | | | | Philip Sidney
1619–1698
3rd Earl of Leicester | | Algernon Sidney
1623–1683 | | Lady Lucy Sidney
1630–1685 | | Henry Sidney
1641–1704
Earl of Romney | | Richard Sackville
1522–1677
5th Earl of Dorset, 5th Baron Buckhurst |
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| | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | Duke of Beaufort, 1682 | | | | | | | | | | | | | | | | | | | | | Baron Cranfield, of Cranfield in the County of Middlesex, 1674
Earl of Middlesex (2nd creation), 1675 |
| | | | | | | | | | | | |
Edward Seymour
1633–1708
4th Baronet | | William Seymour
1650–1671
3rd Duke of Somerset, 2nd Marquess of Hertford, 3rd Earl of Hertford | | John Seymour
c. 1646–1675
4th Duke of Somerset, 3rd Marquess of Hertford, 4th Earl of Hertford | | Francis Seymour
1658–1678
5th Duke of Somerset, 3rd Lord Seymour of Trowbridge | | Charles Seymour
1662–1748
6th Duke of Somerset | | Henry Somerset
1629–1700
1st Duke of Beaufort, 3rd Marquess of Worcester, 7th Earl of Worcester, 9th Baron Herbert | | Robert Sidney
1649–1702
4th Earl of Leicester | | | | | | | | | | Thomas Pelham
1653–1712 | | Charles Sackville
1522–1677
6th Earl of Dorset, 1st Earl of Middlesex, 6th Baron Buckhurst, 1st Baron Cranfield |
|
| | | | | | | | | | Marquessate of Hertford (1st creation) extinct, 1675 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | |
| | | | | Baron Conway of Ragley in the County of Warwick, 1703
Baron Conway of Killultagh in the County of Antrim, 1712 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Duke of Dorset, 1720 |
|
Edward Seymour
1663–1740
5th Baronet | | Francis Seymour-Conway
1679–1732
1st Baron Conway | | | | | | Edward Coke
d. 1707 | | Algernon Seymour
1684–1750
7th Duke of Somerset, Earl of Northumberland | | Charles Somerset
1660–1698
styled Marquess of Worcester | | Philip Sidney
1676–1705
5th Earl of Leicester | | John Sidney
1680–1737
6th Earl of Leicester | | Jocelyn Sidney
1682–1743
7th Earl of Leicester | | Elizabeth Pelham
1681–1711 | | Lionel Sackville
1688–1765
1st Duke of Dorset, 7th Earl of Dorset, 2nd Earl of Middlesex, 7th Baron Buckhurst, 2nd Baron Cranfield |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Leicester (4th creation) extinct, 1743 | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | Baron Lovel, of Minster Lovel in the County of Oxford, 1728
Earl of Leicester (5th creation) and Viscount Coke of Holkham in the County of Norfolk, 1744 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|
Edward Seymour
1695–1757
6th Baronet
8th Duke of Somerset | | | | | | | | | | | | | | | | | | | | Anne Coke | | Thomas Coke
1697–1759
Earl of Leicester, Viscount Coke | | Henry Somerset
1684–1714
2nd Duke of Beaufort, 4th Marquess of Worcester, 8th Earl of Worcester, 10th Baron Herbert | | | | | | Charles Townshend
1700–1764
3rd Viscount Townshend | | | | | | | | | | | | | | | |
| | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | Earl of Hertford (4th creation) and Viscount Beauchamp (2nd creation), 1850
Marquess of Hertford (2nd creation) and Earl of Yarmouth (3rd creation), 1793 | | | | | | | Earldom of Leicester (5th creation) extinct, 1759 | | | | | | | | | | | | | | | | | | | | | | | | | | | Viscount Sackville and Baron Bolebrooke in the County of Sussex, 1782 |
| | | | | | | | | | | | | | | | | | |
Edward Seymour
1717–1792
9th Duke of Somerset | | Webb Seymour
1718–1793
10th Duke of Somerset | | | | | | Francis Seymour
1726–1799 | | Francis Seymour-Conway
1718–1794
1st Marquess of Hertford, Earl of Hertford, Earl of Yarmouth, and Viscount Beauchamp,
2nd Baron Conway | | Wenman (Roberts) Coke
c. 1717–1776 | | | | | | Henry Somerset-Scudamore
1707–1745
3rd Duke of Beaufort, 5th Marquess of Worcester, 9th Earl of Worcester, 11th Baron Herbert | | Charles Noel Somerset
1709–1756
4th Duke of Beaufort, 6th Marquess of Worcester, 10th Earl of Worcester, 12th Baron Herbert | | George Townshend
1724–1807
1st Marquess Townshend | | Charles Sackville
1711–1769
2nd Duke of Dorset, 8th Earl of Dorset, 3rd Earl of Middlesex, 8th Baron Buckhurst, 3rd Baron Cranfield | | John Sackville
1713–1765 | | George Germain
1716–1785
1st Viscount Sackville, 1st Baron Bolebrooke |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | Earl of Leicester (7th creation), 1837 | | | | | | Baron Botetourt abeyance terminated, 1803 | | Earl of Leicester (6th creation), 1784 | | | | | | | | | | | | | | |
| | | | |
| | | | | | | | | | | | | Francis Compton Seymour
d. 1822 | | Francis Ingram-Seymour-Conway
1743–1822
2nd Marquess of Hertford, Earl of Hertford, Earl of Yarmouth, and Viscount Beauchamp,
3rd Baron Conway | | Hugh Seymour
1759–1801 | | Thomas William Coke
1754–1842
1st Earl of Leicester, 1st Viscount Coke | | | | | | Henry Somerset
1744–1803
5th Duke of Beaufort, 7th Marquess of Worcester, 11th Earl of Worcester, 13th Baron Herbert, 5th Baron Botetourt | | George Townshend
1753–1811
2nd Marquess Townshend, 1st Earl of Leicester | | | | | | John Frederick Sackville
1745–1799
3rd Duke of Dorset, 9th Earl of Dorset, 4th Earl of Middlesex, 9th Baron Buckhurst, 4th Baron Cranfield | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Baron Raglan, 1852 | | | | | | | | | | | | | | | | | | | |
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| | | | Edward Adolphus St Maur
1775–1855
11th Duke of Somerset | | | | | | | | | | | Francis Charles Seymour-Conway
1777–1842
3rd Marquess of Hertford, Earl of Hertford, Earl of Yarmouth, and Viscount Beauchamp,
4th Baron Conway | | George Seymour
1787–1870 | | | | | | | Henry Charles Somerset
1766–1835
6th Duke of Beaufort, 8th Marquess of Worcester, 12th Earl of Worcester, 14th Baron Herbert, 6th Baron Botetourt | | FitzRoy James Henry Somerset
1788–1855
1st Baron Raglan | | George Townshend
1778–1855
3rd Marquess Townshend, 2nd Earl of Leicester | | | | | | George John Frederick Sackville
1793–1815
4th Duke of Dorset, 10th Earl of Dorset, 5th Earl of Middlesex, 10th Baron Buckhurst, 5th Baron Cranfield | | John Frederick Sackville
1767–1843
5th Duke of Dorset, 11th Earl of Dorset, 6th Earl of Middlesex, 2nd Viscount Sackville, 11th Baron Buckhurst, 6th Baron Cranfield, 2nd Baron Bolebrooke |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Earldom of Leicester (6th creation) extinct, 1855 | | | | | | | | | | Dukedom of Dorset, Earldoms of Dorset (4th creation) and Middlesex (2nd creation), Viscountcy of Sackville, Baronies of Buckhurst (1st creation), Cranfield, and Bolebrooke extinct, 1843 |
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| | | | | | | | | | | | | Francis Edward Seymour
1788–1866 | | Richard Seymour-Conway
1800–1870
4th Marquess of Hertford, Earl of Hertford, Earl of Yarmouth, and Viscount Beauchamp,
5th Baron Conway | | Francis George Hugh Seymour
1812–1884
5th Marquess of Hertford, Earl of Hertford, Earl of Yarmouth, and Viscount Beauchamp,
6th Baron Conway | | | | | | | Henry Somerset
1792–1853
7th Duke of Beaufort, 9th Marquess of Worcester, 13th Earl of Worcester, 15th Baron Herbert, 8th Baron Botetourt | | | | | |
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| Earl St. Maur, 1863 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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Edward Adolphus St Maur
1804–1885
12th Duke of Somerset | | Archibald Henry Algernon St Maur
1810–1891
13th Duke of Somerset | | Algernon Percy Banks St Maur
1813–1894
14th Duke of Somerset | | Francis Payne Seymour
1815–1870 | | | | | | | | | | | Thomas William Coke
1822–1909
2nd Earl of Leicester, 2nd Viscount Coke | | Henry Charles FitzRoy Somerset
1824–1899
8th Duke of Beaufort, 10th Marquess of Worcester, 14th Earl of Worcester, 16th Baron Herbert, 8th Baron Botetourt | | | | | | Richard Henry FitzRoy Somerset
1817–1884
2nd Baron Raglan |
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| Earldom St. Maur extinct, 1885 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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Edward Adolphus Ferdinand St. Maur
1835–1869 | | | | | | Algernon St Maur
1846–1923
15th Duke of Somerset | | Edward Hamilton Seymour
1860–1931
16th Duke of Somerset | | Hugh de Grey Seymour
1843–1912
6th Marquess of Hertford, Earl of Hertford, Earl of Yarmouth, and Viscount Beauchamp,
7th Baron Conway | | | | | | Thomas William Coke
1848–1941
3rd Earl of Leicester, 3rd Viscount Coke | | Henry Adelbert Wellington FitzRoy Somerset
1847–1924
9th Duke of Beaufort, 11th Marquess of Worcester, 15th Earl of Worcester, 17th Baron Herbert, 9th Baron Botetourt | | Henry Richard Charles Somerset
1849–1932 | | George FitzRoy Henry Somerset
1857–1921
3rd Baron Raglan |
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| | | | | | | | Evelyn Francis Edward Seymour
1882–1954
17th Duke of Somerset | | George Francis Alexander Seymour
1871–1940
7th Marquess of Hertford, Earl of Hertford, Earl of Yarmouth, and Viscount Beauchamp,
8th Baron Conway | | Henry Charles Seymour
1878–1939 | | Thomas William Coke
1880–1949
4th Earl of Leicester, 4th Viscount Coke | | Arthur George Coke
1882–1915 | | | | | | | Henry Charles Somers Augustus Somerset
1874–1945 | | FitzRoy Richard Somerset
1885–1964
4th Baron Raglan |
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| | | | | | | | Percy Hamilton Seymour
1910–1984
18th Duke of Somerset | | | | | | | | | | | Thomas William Edward Coke
1908–1976
5th Earl of Leicester, 5th Viscount Coke | | Anthony Louis Lovel Coke
1909–1994
6th Earl of Leicester, 6th Viscount Coke | | Henry Hugh Arthur FitzRoy Somerset
1900–1984
10th Duke of Beaufort, 12th Marquess of Worcester, 16th Earl of Worcester, 18th Baron Herbert, 10th Baron Botetourt | | Henry Robert Somers FitzRoy de Vere Somerset
1898–1965 | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Barony Botetourt abeyant, 1984 | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | Hugh Edward Conway Seymour
1930–1997
8th Marquess of Hertford, Earl of Hertford, Earl of Yarmouth, and Viscount Beauchamp,
9th Baron Conway | | | | | | Edward Douglas Coke
1936–2015
7th Earl of Leicester, 7th Viscount Coke | | | | | | David Robert Somerset
1928–2017
11th Duke of Beaufort, 13th Marquess of Worcester, 17th Earl of Worcester | | FitzRoy John Somerset
1927–2010
5th Baron Raglan | | Geoffrey Somerset
b. 1932
6th Baron Raglan |
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| | | | | | | | John Michael Edward Seymour
b. 1952
19th Duke of Somerset | | | | | | Henry (Harry) Jocelyn Seymour
b. 1958
9th Marquess of Hertford, Earl of Hertford, Earl of Yarmouth, and Viscount Beauchamp,
10th Baron Conway | | | | | | Thomas Edward Coke
b. 1965
8th Earl of Leicester, 8th Viscount Coke | | | | | | Henry John FitzRoy Somerset
b. 1952
12th Duke of Beaufort, 14th Marquess of Worcester, 18th Earl of Worcester | | | | | | Arthur Geoffrey Somerset
1960–2012 | |
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| | | | | | | | Sebastian Edward Seymour
b. 1982
styled Lord Seymour | | | | | | William Francis Seymour
b. 1993
styled Earl of Yarmouth | | | | | | Edward Horatio Coke
b. 2003
styled Viscount Coke | | | | | | Henry Robert FitzRoy Somerset
b. 1989
styled Marquess of Worcester | | | | | | Inigo Arthur Fitzroy Somerset
b. 2004 | |
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| | | | | | | | Heir apparent to the Dukedom of Somerset | | | | | | Heir apparent to the Marquessage of Hertford | | | | | | Heir apparent to the Earldom of Leicester | | | | | | Heir apparent to the Dukedom of Beaufort | | | | | | Heir apparent to the Raglan Barony |
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