Mary married Henry IV (Plantagenet), King of England in 1380 in Rochford, Essex, England. Henry (son of John (Plantagenet), of Gaunt, 1st Duke of Lancaster and Blanche (Plantagenet), of Lancaster) was born on 30 May 1366 in Bolingbroke, Lincolnshire, England; died on 21 March 1413 in Westminster Palace, Westminster, Middlesex, England; was buried in Canterbury Cathedral, Canterbury, Kent, England. [Group Sheet] [Family Chart]

1. Henry V (Plantagenet), King of England was born on 9 Aug. 1387 in Monmouth, Monmouthshire, England; died on 31 Aug. 1422 in Bois de Vincennes, France; was buried in Westminster Abbey, Westminster, Middlesex, England.
2. Thomas (Plantagenet), 1st Duke of Clarence was born circa May 1388; died on 22 March 1421 in Baugé, France.
3. John (Plantagenet), 1st Duke of Bedford was born on 20 June 1389; died on 15 Sept. 1435.