Claim: Rikissa Birgersdotter (c. 1237 – after 1288) was born as one of the eldest children in the marriage of lord Birger Magnusson of Bjelbo and Princess Ingeborg Eriksdotter of Sweden and she received her name in honor of her maternal grandmother, the late Rikissa of Denmark.
Evidence: Rikissa Birgersdotter, also known as Rixa, Richeza, Richilda and Regitze, (c. 1237 – after 1288) was Queen of Norway as the wife of the co-king Haakon Haakonson, and later Princess of Werle as wife of Henry I, Prince of Mecklenburg-Güstrow. Rikissa Birgersdotter was born as one of the eldest children in the marriage of lord Birger Magnusson of Bjelbo (Birger Jarl) later riksjarl and regent of Sweden, and Princess Ingeborg Eriksdotter of Sweden, eldest sibling of King Eric XI of Sweden. Rikissa received her name in honor of her maternal grandmother, the late Rikissa of Denmark, queen of Sweden – the Scandinavian custom was to give names of deceased grandmothers to daughters of a family, and a first-born daughter was usually christened as namesake of maternal grandmother, if she was no longer alive.