Gregers Birgersson Swedish knight (d. 1276) Parents NN Birger Jarl Children NN Gregersdotter av Arnö squire Knut Gregerson av Arnö, lord of Näs Magnus Gregersson Karl Gregersson Siblings Eric Birgersson Rikissa Birgersdotter Valdemar Catherine Birgersdotter of Bjelbo Ingeborg Birgersdotter of Bjelbo Magnus III of Sweden Benedict, Duke of Finland Kristina Birgersdotter