
| 1. | Katherine Swynford Katherine married John Plantagenet, of Gaunt, 1st Duke of Lancaster in 1396. John (son of Edward Plantagenet, King Edward III and Philippa, of Hainault) was born on 6 Mar 1340 in Ghent, Flanders, Belgium; died on 3 Feb 1399 in Leicester Castle, Leicestershire; was buried in St Paul's Cathedral, London, England. [Group Sheet] [Family Chart]
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| 2. | John Beaufort, 1st Earl of Somerset |
| 3. | Cardinal Henry Beaufort |
| 4. | Thomas Beaufort, Duke of Exeter |
| 5. | Joan Beaufort, Countess of Westmorland |