Claim: Ingeborg Eriksdotter of Sweden's brother Eric XI reacquired the Swedish throne in 1234 and in 1250 when her brother died without heirs, her eldest son, Valdemar, was chosen to take the throne.
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. 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. In 1250, her brother died without heirs and her eldest son Valdemar was chosen to succeed Eric on the throne.