| Male John de Beaufort, 1st Duke of Somerset, 3rd Earl of Somerset, KG |
| Birth | 25 Mar 1404 | |
| Death | 30 May 1444 | |
| Burial | ||
| Marriage | ||
| Father | John de Beaufort, 1st Marquess of Somerset and 1st Marquess of Dorset, later only 1st Earl of Somerset, KG | F510 Group Sheet | |
| Mother | Margaret Holland, Duchess Of Clarence, Lady Companions of the Garter | F510 Group Sheet | |
| Female Margaret Beauchamp, of Bletso |
| Birth | Abt. 1410 | |
| Death | Bef. 3 Jun 1482 | |
| Burial | ||
| Other Spouse | Oliver St John, Sir | F85 | |
| Marriage | ||
| Father | John Beauchamp, Sir, de jure 3rd Baron Beauchamp of Bletso | F609 Group Sheet | |
| Mother | Edith Stourton | F609 Group Sheet | |