John I d' Avesnes , Count of Holland & Adelaide (Aleidis) of Holland 
John I d' and Adelaide (Aleidis) of were married in a religious ceremony on October 9th, 1246. They had two sons named John II d' and Guy de.
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Personal Details
John I d' Avesnes , Count of Holland
John I d' was born on May 1st, 1218 in Oizy, Namur, Belgium. He died at the age of 38 in 1256 in Holland.
Adelaide (Aleidis) of Holland
Adelaide (Aleidis) of was born about 1228 in 's-Gravenhage, Zuid-Holland, Netherlands. She died about 1284.
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Children
John II d' Avesnes , Count of Hainault
John II d' was born in 1247 in Hainault, Flanders, Beglium. He died at the age of 57 on August 22nd, 1304.
Guy de Avesnes
Guy de was born about 1253 in Valenciennes, Nord, Nord-Pas-de-Calais, France. He died on May 28th, 1317 in (unmarried).
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