Question: Who is the maternal grandfather of Catherine Birgersdotter Of Bjelbo?
Sentence (from "Ingeborg Eriksdotter of Sweden"): 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.
Relevant evidence: Yes