| Female Countess of Flanders Margaret, I |
| Birth | ||
| Death | 1280 | |
| Burial | ||
| Father | Count of Flanders Baldwin, IX | F1722 Group Sheet | |
| Mother | Mary, of Champaigne | F1722 Group Sheet | |
| Male + Count of Hainault John |
| Birth | ||
| Death | 24 Dec 1257 | |
| Burial | ||
| Spouse | Countess of Holland Aleidis | F1720 | |
| Marriage | 1246 | |