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Male Siward Biornsson Earl von Northumberland Click to view Siward Biornsson Earl von Northumberland in the family tree

Siward Biornsson Earl was born about 1012 in Of, Denmark.1   Siward Biornsson Earl's father was Biorn (Bjorn) Ulsiusson (Estridsen).  His paternal grandparents were Ulf Thorgilsson and Estrid Svendsdatter Prinzessin von Daenemark.  He was an only child.  He died in 1055 in York, Yorkshire, England.1 

Family Details of Siward Biornsson Earl's family with Aelfled (Elfleda) von Bernicia

Family Details of Siward Biornsson Earl's family with Godiva

1 World Family Tree Vol. 11, Ed. 1 @ Tree #3804

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