Family Group Sheet| FATHER | | Jean I de Avesnes | | BIRTH | 1 May 1218 | Noord Frankrijk | | REF # | | 9022; | | OCCUPATION | | "Jean I was graaf van Vlaanderen en Hainnault."; | | | | MOTHER | | Aleida gravin van Holland | | BIRTH | 1225 | Nederland | | DEATH | 1284 | Valenciennes | | REF # | | 9023; | | FATHER | Floris IV van Holland | | MOTHER | Mechtild van Brabant |
| | | CHILDREN | | 1. | Jan II van Avesnes MALE | | | BIRTH | about 1247 | | | DEATH | 11 September 1304 | Valenciennes | | REF # | | 9018; |
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