| Male Sir Bouchard d'Avêsnes, Seigneur d'Avêsnes and d'Etroen |
| Birth | Abt 1180 | |
| Death | 1244 | Étrœungt, Nord, Hauts-de-France, France |
| Burial | 1244 | Clairefontaine Abbey, Wallonia, Belgium |
| Marriage | Jul 1212 [1, 2, 3] | |
| Divorced | 1221 [3] | |
| Father | Jacques d'Avêsnes, Seigneur d'Avêsnes, Leuze, Conde and Guise | F3349 Group Sheet | |
| Mother | Adele de Guise | F3349 Group Sheet | |
| Female Margaret, Countess of Hainault and Flanders |
| Birth | 2 Jun 1202 | Constantinople (now Istanbul), Empire of the East |
| Death | 10 Feb 1280 | |
| Burial | ||
| Other Spouse | first husband | F8889 | |
| Marriage | ||
| Father | Baldwin VI, Count of Hainaut and Latin Emperor of Constantinople | F2716 Group Sheet | |
| Mother | Marie of Champagne, Empress of Constantinople | F2716 Group Sheet | |
| Male + Jean I d'Avêsnes, Seigneur d'Avesnes |
| Birth | 1 May 1218 | Étrœungt, Nord, Hauts-de-France, France |
| Death | 24 Dec 1257 | |
| Burial | Aft 24 Dec 1257 | Valenciennes, Nord, Hauts-de-France, France |
| Spouse | Adelaide of Holland | F3539 | |
| Marriage | 9 Oct 1246 | |
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Sources 🟢 Primary Evidence 🟡 Secondary Evidence 🟠 Tertiary Evidence 🔴 Unreliable Evidence |
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