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Male Johann I von Hennegau Click to view Johann I von Hennegau in the family tree

Johann I was born in 1247 in Brabant, Antwerp, Belgium.  Johann I's father was Jean I D'Avesnes and his mother was Adelheid Von Holland.  His paternal grandparents were Bouchard d'Avesnes and Margarethe Von Flandern; his maternal grandparents were Florens IV Von Holland and Mathilde Von Brabant. He had five brothers and a sister, named Baldwin, Bouchard, Guy, William, Floris and Jeanne.  He was the oldest of the seven children.  He died at the age of 57 on August 22nd, 1304 in Valenciennes, Nord, France.


Johann I's family with Philippa of Luxembourg

‌Johann I and Philippa of were married in a religious ceremony in 1270 in Valenciennes, Nord, France.  They had a son named Wilhelm III.

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