Claim: Ingeborg Eriksdotter of Sweden, a Swedish princess and duchess, had several children with her husband, but her son Valdemer was chosen to take over the throne when he brother Eric Xldied.
Evidence: Ingeborg Eriksdotter (c. 1212 – 17 June 1254) was a Swedish princess and duchess, daughter of King Eric X of Sweden, eldest sibling of King Eric XI of Sweden, wife of Birger Jarl, and mother of Kings Valdemar and Magnus III of Sweden. Princess Ingeborg bore a vast number of children to her husband Duke Birger Jarl. In 1250, her brother died without heirs and her eldest son Valdemar was chosen to succeed Eric on the throne. Ingeborg's marital engagement took place about 1234, in connection with her brother Eric XI reacquiring the Swedish throne from the usurper Canute II of Sweden, so that she and Eric could have the mighty House of Bjelbo as their ally.