 
| Autres noms | Nom | 
|---|---|
| Nom marital | Fitzroy Plantagenet | 
| Conjoint | Date de naissance | Enfants | 
|---|---|---|
|  JOHN I Fitzroy Plantagenet HP01 WC01 | 24/12/1166 |  ISABEL "le Blanche" HP02 (alternative) | 
| John had more than ten known illegitimate children, of which the best known are: Richard FitzRoy (c. 1190 – June 1246) whose mother was Adela, John's first cousin Joan, Lady of Wales (c. 1191 – February 1237) also known by her Welsh name of Siwan | 
| Date | Âge | Événement | Catégorie | 
|---|