Thomas Beaufort (~
1377 -
1426) was the third of the four children of
John of Gaunt, Duke of Lancaster, and his mistress
Katherine Swynford. He was legitimated when the others were, in
1390 and again in
1397. He was Chancellor of England (1410-1412) and was created
Earl of Dorset[?] (
1411) and Duke of Exeter (
1416). He married a
Margaret Neville[?] (there were a lot of Margarets and a lot of Nevilles around the royal circle then, but this one was the daughter of Thomas Neville of Horneby). They had only one child,
Henry Beaufort[?], and he died young.