Harthacnut was King of Denmark from 1035, and King of England from 1040 until his death in 1042. He was the last monarch of the North Sea Empire, an empire consisting of England and Denmark, and was also the last monarch of the House of Knýtlinga. Born: 1018 Died: June 14, 1042 In office: March 29, 1040 – June 14, 1042 Wiki link