Original name: Valdemar Magnusson
Prince if Sweden and Duke of Finland, Upland and Eyland. Bielbo Dynasty. Son of King Magnus III Barnlock and Queen Haelwig. Rebelled with his brother Duke Eric against their brother King Birger, so that the two rebels were locked up to die in a castle tower. His widow Ingiburga, originally a Princess of Norway, went on as active Duchess of Eyland until her death.