Nielsen Hayden genealogy
Ancestors of Katharina of Sweden
┌── Ulf Tostesson (Abt 970 - ??)
┌── Ragvald Ulfsson (Abt 990 - ??)
┌── Stenkil Ragnvaldsson, King of Sweden (Abt 1020 - 1066)
│ └── Astrid Njalsdotter
│
┌── Inge Stenkilsson, King of Sweden (Abt 1040 - Abt 1100)
│ │
│ │ ┌── Eric Bjornsson, King of Sweden (Sweden;Abt 935 - Abt 994)
│ │ ┌── Olof Skötkonung, King of Sweden (Sweden;Abt 965 - Abt 1020)
│ │ │ └── Sigrið Storråda
│ │ │
│ │ ┌── Emund, King of Sweden
│ │ │ └── Ethla of Wendland
│ │ │
│ └── (Unknown) of Sweden
│
└── Helena (Abt 1050 - ??)