Karl Knutsson Bonde (c. 1408–1470), also known as Charles VIII and called Charles I in Norwegian contexts, was King of Sweden (1448–1457, 1464–1465 and 1467–1470) and King of Norway (1449–1450). He rose in Swedish politics during King Erik of Pomerania's unpopularity, becoming regent after a rebellion by Engelbrekt Engelbrektsson. He held powerful posts, notably in Finland, where he acted semi-independently. After King Christopher's death in 1448, Karl was elected king of Sweden and briefly king of Norway (1449–1450), but was forced to relinquish the latter to Christian I of Denmark.
https://en.wikipedia.org/wiki/Karl_Knutsson