Jean I De Avesnes 
Jean I was born in April 1218 in Houffalize, Luxembourg. Jean I's father is Bouchard De Avesnes and his mother is Marguerite De Hainault. He was an only child. He died at the age of 39 on December 24th, 1257 in Valenciennes, Nord, France.
They had six sons and a daughter, named Jean II, Baudouin, Bouchard, Guy, Guillaume, Floris and Jeanne.
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Children
Jean II De Avesnes
Jean II was born about 1247 in Brabant, Flanders. He died on August 22nd, 1304 in Valenciennes, Nord, France.
Bouchard De Avesnes
Bouchard was born on May 26th, 1251 in Valenciennes, Nord, France. He died at the age of 45 on November 29th, 1296.
Guy De Avesnes
Guy was born about 1253 in Valenciennes, Nord, France. He died on May 28th, 1317 in Utrecht, Utrecht, Netherlands.
Guillaume De Avesnes
Guillaume was born in 1254 in Valenciennes, Nord, France. He died at the age of 42 in 1296.
Floris De Avesnes
Floris was born in 1255 in Valenciennes, Nord, France. He died at the age of 42 on January 23rd, 1297.
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