Baldwin of Avesnes [SEP] father
Baldwin of Avesnes
Baldwin of Avesnes (September 1219 in Oizy – 10 April 1295 in Avesnes) was a son of Bouchard IV of Avesnes and his wife, Margaret II of Flanders. His parents' marriage was later declared illegal, because his father had already received minor orders. Baldwin was later declared legitimate by the pope, at the instigation of King Louis IX of France. In 1246, Baldwin received Beaumont as an apanage.
He fought his whole life, together with his brother John I, against his half
he may have succeeded his father already by 1171, as the genealogies of Baldwin of Avesnes imply that he was already castellan when married his wife, Ida of Avesnes (a sister of the Crusader James of Avesnes), and the couple's eldest son, the future William V of Saint Omer, was already over 15 years old in 1186. William is attested in a series of documents and charters until 9 August 1190, but it appears that he then left for the Holy Land, where he died in 1191.