| Male Thomas of Lancaster, Duke of Clarence (1387–1421) |
| Birth | 1387 | |
| Death | 1421 | |
| Burial | ||
| Marriage | ||
| Father | Henry IV, King of England | F851 Group Sheet | |
| Mother | Mary de Bohun | F851 Group Sheet | |
| Female Margaret Holland, Duchess Of Clarence, Lady Companions of the Garter |
| Birth | 1385 | |
| Death | 31 Dec 1439 | |
| Burial | ||
| Other Spouse | John de Beaufort, 1st Marquess of Somerset and 1st Marquess of Dorset, later only 1st Earl of Somerset, KG | F510 | |
| Marriage | ||
| Father | Thomas Holland, 2nd Earl of Kent KG | F212 Group Sheet | |
| Mother | Alice FitzAlan, Lady | F212 Group Sheet | |