Ingeborg Birgersdotter of Bjelbo Duchess consort of Saxony (1253–1302) Parents Ingeborg Eriksdotter of Sweden Birger Jarl Children Eric I, Duke of Saxe-Lauenburg Elisabeth von Sachsen-Lauenburg Helena of Saxe-Lauenburg John II, Duke of Saxe-Lauenburg Albert III, Duke of Saxe-Lauenburg Siblings Eric Birgersson Rikissa Birgersdotter Valdemar Catherine Birgersdotter of Bjelbo Gregers Birgersson Benedict, Duke of Finland Magnus III of Sweden Kristina Birgersdotter Partners John I, Duke of Saxony