Overview
Ingeborg Eriksdotter ( – 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.
Biography
Ingeborg was born the eldest daughter of King Eric X of Sweden and his wife Richeza of Denmark. She lived during her youth in exile in Denmark after her brother had been deposed by his guardian and regent in 1229.
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.
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. Valdemar was chosen because he was her son, and her husband was made regent during his minority. Ingeborg thus became King's Mother and first lady of the royal court.
From Wikipedia (CC BY-SA 4.0).