Cnut was born in 995 and died 12th November 1035. He was the son of Sweyn Forkbeard who invaded England and took the throne from King Aethelred the Unready in 1013. After Sweyn’s death in 1014, the throne returned to Aethelred the Unready but when he died in 1016, Cnut invaded and defeated Aethelred’s son Edmund Ironside. He took the throne and married Aethelred’s widow, Emma of Normandy.
Family tree for King Cnut the Great, son of Sweyn Forkbeard showing: