Canute IV of Denmark sibling Olaf I of Denmark
Aborted attempt on England
However, Canute's ambitions were not purely domestic. As the grandnephew of Canute the Great, who had ruled England, Denmark and Norway until 1035, Canute considered the crown of England to be rightfully his and regarded William I of England as a usurper. In 1085, with the support of his father-in-law, Count Robert, and Olaf III of Norway, Canute planned an invasion of England and called his fleet in leding at the Limfjord. The fleet never set sail, as Canute was preoccupied in Schleswig by the potential threat of Henry IV, Holy Roman Emperor with whom both Denmark and Flanders were on unfriendly terms. Canute feared an invasion by Henry, whose enemy Rudolf of Rheinfelden had sought refuge in Denmark.The warriors of the fleet, mostly made up of peasants who needed to be home for the harvest season, got weary of waiting and elected Canute's brother Olaf (the later Olaf I of Denmark) to argue their case. That raised the suspicion of Canute, who had Olaf arrested and sent to Flanders. The leding was eventually dispersed, and the peasants tended to their harvests, but Canute intended to reassemble within a year.
brother or sister kin