Harthacnut

Type Figure Region Denmark Time 1018–1042 Also known as Harthacnut、Hardeknud、Canute III

Harthacnut (1018–1042), legitimate son of Cnut the Great and Emma of Normandy, succeeded to Denmark in 1035 and to England in 1040, briefly reuniting…

Timeline

1018–1035England · EnglandLegitimate son of Cnut and Emma, designated heir to the thrones of Denmark and England; in 1035 he was in Denmark when his father died and could not return to England in time to contest the throne.
1035–1042Roskilde · ZealandSucceeded to the Danish throne in 1035; in 1040, after his brother Harold's death, he returned to England with a fleet, established control over England by forceful means, and also held the Danish crown.
1040–1042Lambeth · LondonBecame King of England in 1040; died suddenly at a wedding feast in June 1042 without issue, ending the House of Cnut's rule in England.

Sources

Anglo-Saxon Chronicle https://www.bl.uk/collection-items/anglo-saxon-chronicle
Harthacnut — Encyclopaedia Britannica https://www.britannica.com/biography/Harthacnut