| Male Duke of Lancaster John Plantagenet |
| Birth | Mar 1340 | St. Bavon's Abbey, Ghent, Flanders, Netherlands |
| Death | 3 Feb 1399 | Leicester Castle, Leicester, Leicestershire, England, United Kingdom |
| Burial | ||
| Marriage | 19 May 1359 | Reading Abbey, Reading, Berkshire, England, United Kingdom |
| Other Spouse | Catherine Swynford Roet | F1789 | |
| Marriage | 13 Jan 1396 | Lincoln Cathedral, Lincoln, Lincolnshire, England, United Kingdom |
| Father | King of England Edward Plantagenet, III | F1600 Group Sheet | |
| Mother | Philippa, of Hainault | F1600 Group Sheet | |
| Female Countess of Derby Blanche Plantagenet |
| Birth | 25 Mar 1341 | |
| Death | 12 Sep 1368 | Bolingbrooke Castle, Billingborough, Lincolnshire, England, United Kingdom |
| Burial | ||
| Father | ||
| Mother | ||
+ King of England Henry Plantagenet, IV |
| Birth | 30 May 1366 | Bolingbrooke Castle, Billingborough, Lincolnshire, England, United Kingdom |
| Death | 20 Mar 1413 | London, Greater London, England, United Kingdom |
| Burial |