The Danish House of Knýtlinga was lived in by Cnut the Great and his grandfather that had what last name?
House of Knýtlinga:  Its most famous king was Cnut the Great, who gave his name to this dynasty. House of Knýtlinga:  Other notable members were Cnut's father Sweyn Forkbeard, grandfather Harald Bluetooth, and sons Harthacnut, Harold Harefoot, and Svein Knutsson.
i don't know