states that he married an unnamed daughter of Isaac, Count of Cambrai, and that Fulbert, Bishop of Cambrai, dissolved the marriage on the grounds of consanguinity
the Church of Aubert of Avranches at Cambrai, France. It was commissioned by Guiard of Laon, the Bishop of Cambrai (1238–1248). The author expressly stated
daughter by her: Name unknown; married Isaac of Cambrai. Their son Arnulf succeeded his father as Count of Cambrai. In 934 he married Adele of Vermandois
of him being count of Cambrai, and his name, that his father must be the Arnulf who was named as a son of Count Isaac of Cambrai in 941. It has also been
Richard. Isaac changed his mind, however, and tried to escape. Richard's troops, led by Guy de Lusignan, conquered the whole island by 1 June. Isaac surrendered