Alternative names: Jean_ I De_ AVESNES (maiden name, name before first marriage), Johann I. von Avesnes u. Hennegau (maiden name, name before first marriage), William Jean I (William Jean I ) d'Avesnes (maiden name, name before first marriage), Jean I de Avesnes Count of Flanders and Hainault (maiden name, name before first marriage), William Jean I d'Avesnes (maiden name, name before first marriage), Jean d'avesnes Sgr Avesnes, A Wttenweerde, John I Avesnes d' Avenes Count of Holland, John de Avesnes, Jean I D' Avesnes Count Of Flanders & Hainault, (Count Of Flandre) I D' Avesnes, Count Jean John 1 De Avesnes of Hainault, Jean I d'Avesnes Count of Holland
When copying data from this family tree, please include a reference to the origin: Jack Melis, "Melis stamboom", database, Genealogy Online (https://www.genealogieonline.nl/melis-stamboom/I3221826.php : accessed June 20, 2024), "Jean d'Avesnes (1218-1257)".
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