William Busac
William Busac, son of William I, Count of Eu, and his wife Lesceline. Count of Eu, Count of Soissons, de jure uxoris. William was given the nickname Busac by the medieval chronicler Robert of Torigni.
William appealed to King Henry I of France, who gave him in marriage Adelaide, the heiress of the county of Soissons. Adelaide was daughter of Renaud I, Count of Soissons, and Grand Master of the Hotel de France. William then became Count of Soissons in right of his wife. William and Adelaide had four children:
His son Renaud became Count of Soissons upon William’s death, and he was succeeded by his brother John.
