Dukes of Somerset
John Beaufort, before legitimised
John Beaufort (1373–1410) 1st Earl of Somerset
John Beaufort (1373–1410) 1st Earl of Somerset, 1st Marquess of Somerset and 1st Marquess of Dorset. Married Margaret Holland (1385 – 1439) daughter of Thomas Holland, 2nd Earl of Kent. See House of Lancaster
Children of John Beaufort, 1st Earl of Somerset and Margaret Holland:
- Henry Beaufort, 2nd Earl of Somerset (1401 – 1418)
John Beaufort, 1st Duke of Somerset
- John Beaufort, 1st Duke of Somerset, 3rd Earl of Somerset, 1st Earl of Kendal. (1404 – 1444) Married Margaret Beauchamp (c. 1410 – 1482) daughter of Sir John Beauchamp, de jure 3rd Baron Beauchamp of Bletsoe.
Joan Beaufort (1404 – 1445)
- Joan Beaufort (1404 – 1445) Married James I (1394 – 1437) King of Scots.
- Thomas Beaufort (1405 – 1431) Count of Perche
Edmund Beaufort (1406 – 1455) 2nd Duke of Somerset
- Edmund Beaufort (1406 – 1455) 2nd Duke of Somerset, 4th Earl of Somerset, 1st Earl of Dorset and 1st Marquess of Dorset and Count of Mortain. Married Lady Eleanor Beauchamp, Baroness de Ros (1408 – 1467) daughter of Richard de Beauchamp, 13th Earl of Warwick.
Margaret Beaufort (1409–1449)
- Margaret Beaufort (1409–1449) Married Thomas de Courtenay (1414 – 1458) 13th Earl of Devon.
Daughter of John Beaufort, 1st Duke of Somerset and Margaret Beauchamp:
Lady Margaret Beaufort (1441/3 – 1509)
- Lady Margaret Beaufort (1441/3 – 1509) Married firstly John de la Pole, 2nd Duke of Suffolk (1442 – 1492) (dissolved 1453), secondly Edmund Tudor (1430 – 1456) 1st Earl of Richmond (1430 – 1456) See House of Tudor, thirdly Sir Henry Stafford (c. 1425 – 1471) and fourthly Thomas Stanley (1435 – 1504) 1st Earl of Derby.
Children of Edmund Beaufort, 2nd Duke of Somerset and Eleanor Beauchamp:
Eleanor Beaufort (1433 – 1501)
- Eleanor Beaufort (1433 – 1501) Married firstly James Butler (1420 – 1461) 5th Earl of Ormond, 1st Earl of Wiltshire and secondly Sir Robert Spencer
Joan Beaufort (1433 – 1518)
- Joan Beaufort (1433 – 1518) Married firstly Robert St Lawrence (1435 –1488) 3rd Baron Howth and secondly Sir Richard Fry
Anne Beaufort (1435 – 1496)
- Anne Beaufort (1435 – 1496) Married Sir William Paston (1436 – 1496)
- Henry Beaufort (1436 – 1464) 3rd Duke of Somerset. See House of Somerset
Margaret Beaufort (1437–1474)
- Margaret Beaufort (1437–1474) Married firstly Humphrey(d. 1457) Earl of Stafford and secondly Sir Richard Darell, of Littlecote
- Edmund Beaufort (1439 – 1471) 4th Duke of Somerset. With his execution the house of Beaufort and all the honours to which they were entitled became extinct.
- Lord John Beaufort (1441 – 1471) Earl of Dorset
Elizabeth Beaufort (1443 – 1475)
- Elizabeth Beaufort (1443 – 1475) Married Sir Henry Fitz Lewis.