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- 1 Margaret Holland, Duchess Of Clarence, Lady Companions of the Garter [1] b. 1385 d. 31 Dec 1439
- + Thomas of Lancaster, Duke of Clarence (1387–1421) b. 1387 d. 1421
John de Beaufort, 1st Marquess of Somerset and 1st Marquess of Dorset, later only 1st Earl of Somerset, KG b. 1371 d. 16 March 1410
- 2 Henry de Beaufort, 2nd Earl of Somerset [1.1]
b. 26 Nov 1401 d. 25 Nov 1418
- 2 Joan Beaufort, Lady, Queen of Scots [1.2]
b. Abt. 1404 d. 15 Jul 1445
- 2 John de Beaufort, 1st Duke of Somerset, 3rd Earl of Somerset, KG [1.3]
b. 25 Mar 1404 d. 30 May 1444
- 2 Thomas de Beaufort, 1st Count of Perche [1.4]
b. Abt. 1405 d. 3 Oct 1431
- 2 Edmund de Beaufort, 2nd Duke of Somerset, 4th Earl of Somerset, 1st Earl of Dorset, 1st Marquess of Dorset styled 1st Count of Mortain,KG [1.5]
b. 1406 d. 22 May 1455
- 2 Margaret de Beaufort, Countess of Devon [1.6]
b. Abt. 1409 d. 1449