Charles VIII of Sweden Charles I of Norway, also Carl, , was king of Sweden

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 (1448–1457, 1464–1465 and from 1467 to his death in 1470) and king of Norway

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 (1449–1450).

Referring to Karl Knutsson as King Charles VIII is a later invention, counting backwards from Charles IX

Charles IX of Sweden

Charles IX of Sweden also Carl, was King of Sweden from 1604 until his death. He was the youngest son of King Gustav I of Sweden and his second wife, Margaret Leijonhufvud, brother of Eric XIV and John III of Sweden, and uncle of Sigismund III Vasa king of both Sweden and Poland...

 (1604–1611), who adopted his numeral after studying a fictitious history of Sweden. Prior to Karl Knutsson, Sweden had only had one king

Charles VII of Sweden

Charles "VII" also Carl , or Karl Sverkersson in Swedish , was ruler of Gothenland, and then King of Sweden from circa 1161 to 1167, when he was assassinated....

 named Karl (Charles).