Harthacnut. Harthacnut, sometimes referred to as Canute III, was King of Denmark from 1035 to 1042 and King of England from 1040 to 1042.
He was the son of King Cnut the Great and Emma of Normandy. When Cnut died in 1035, Harthacnut struggled to retain his father's possessions.
Magnus I took control of Norway, but Harthacnut succeeded as King of Denmark and became King of England in 1040 after the death of his half-brother Harold Harefoot. Harthacnut died suddenly in 1042 and was succeeded by Magnus in Denmark and Edward the Confessor in England.
Harthacnut was the last Scandinavian to rule England. Harthacnut was born shortly after the marriage of his parents in July or August 1017.
Cnut had put aside his first wife Aelfgifu of Northampton to marry Emma, and according to the Encomium Emmae Reginae, a book she inspired many years later, Cnut agreed that any sons of their marriage should take precedence over the sons of his first marriage. In 1023, Emma and Harthacnut played a leading role in the translation of the body of the martyr St Aeelfheah from London to Canterbury, an occasion seen by Harthacnut's biographer, Ian Howard, as recognition of his position as Cnut's heir in England. In the 1020s Denmark was threatened by Norway and Sweden, and in 1026 Cnut decided to strengthen its defences by bringing over his eight-year-old son to be the future king under a council headed by his brothe