Nielsen Hayden genealogy
Descendants of Katharina of Sweden
Father: Inge Stenkilsson, King of Sweden (Abt 1040 - Abt 1100)
Mother: Helena (Abt 1050 - ??)
Katharina of Sweden
Björn Jernside (Abt 1100 - 4 Jun 1134)
   └─ Christine Björnsdatter, Queen of Sweden (Between 1120 and 1125 - ??)
    St. Erik IX, King of Sweden (Abt 1120 - 18 May 1159 Uppsala, Uppsala, Sweden)(m. Bef 1158)
       └─ Canute I Eriksson, King of Sweden ( - 1196)
       
           └─ Erik X Knutsson, King of Sweden (Abt 1180 - 10 Apr 1216) =>
            + Richiza of Denmark ( - 8 May 1220 bur.Ringsted, Zealand, Denmark)(m. 1210)