Margaret married John "Fairborn" BEAUFORT, [MARQUESS OF SOMERSET K.G.] before 28 Sep 1397 in Of, Upholland, Lancashire, England. John (son of John "Of Gaunt" Prince Of ENGLAND, [DUKE OF LANCASTER] and Catherine De ROET, [DUCHESS OF LANCASTER]) was born about 1371 in Near Pottersgate, Lincolnshire, England; died on 16 Mar 1409/10 in St Catherine By The Tower Hospital, London, Middlesex, England; was buried in St Michael's Chapel, Canterbury Cathedral, Kent, England. [Group Sheet] [Family Chart]

1. Edmund BEAUFORT, [DUKE OF SOMERSET] was born about 1406 in Of, Westminster, Middlesex, England; died on 22 May 1455 in Battle Of, St. Albans; was buried in Abbey.
2. John BEAUFORT, [DUKE OF SOMERSET] was born on 25 Mar 1404 in Of, Westminster, Middlesex, England; died on 27 May 1444 in Spm.
3. Thomas BEAUFORT was born in 1405 in Of, Westminster, Middlesex, England; died in 1432 in Unmd.
4. Joan BEAUFORT, [QUEEN OF SCOTLAND] was born about 1406 in Of, Westminster, Middlesex, England; died on 15 Jul 1445 in Dunbar Castle, Dunbar, East Lothian, Scotland; was buried on 22 Nov 1445 in Charterhouse, Perth, Perthshire, Scotland.
5. Margaret BEAUFORT was born about 1409 in Of, Westminster, Middlesex, England.
6. Henry BEAUFORT, [EARL OF SOMERSET] was born in Of, Westminster, Middlesex, England; was christened on 26 Nov 1401; died on 25 Nov 1418 in Unmd.

Margaret married Thomas "of Lancaster" PLANTAGENET, [PRINCE OF ENGLAND D CLARENCE] on 10 Nov 1411 in Dispensation. [Group Sheet] [Family Chart]