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Male Siward of Northumbria Click to view Siward of Northumbria in the family tree

Siward was born in 0984.1   Siward's father was Thorkils (Sparkalägg) Styrbjornsson and his mother was Sigrid.  His paternal grandparents were Styrbjorn (The Strong) Olafsson and Queen of Norway Thyra Haraldsdottir. He had three brothers and two sisters, named Eric, Fulbert, Ulf, Gytha and Eilaf.1 

1 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=jdp-fam&id=I22397

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