| Male Earl of Somerset John Beaufort |
| Birth | 1373 | |
| Death | 16 Mar 1410 | St. Katherine by the Tower, London, Greater London, England, United Kingdom |
| Burial | ||
| Marriage | 28 Sep 1397 | |
| Father | Duke of Lancaster John Plantagenet | F1789 Group Sheet | |
| Mother | Catherine Swynford Roet | F1789 Group Sheet | |
| Female Margaret Holland |
| Birth | 1383 | |
| Death | 30 Dec 1439 | St. Saviours Abbey, Bermondsey, London, Greater London, England, United Kingdom |
| Burial | ||
| Father | ||
| Mother | ||
| Male + Duke of Somerset John Beaufort |
| Birth | 1404 | |
| Death | 27 May 1444 | Wimborne, Dorset, England, United Kingdom |
| Burial | ||
| Spouse | Duchess of Somerset Margaret Beauchamp | F1802 | |
| Marriage | 1440 | |
| Female + Queen of Scots Joan Beaufort |
| Birth | ||
| Death | 15 Jul 1145 | |
| Burial | ||
| Spouse | King of Scotland James Stuart, I | F4939 | |
| Marriage | 1424 | London, England |