*Siward Biornsson
born Abt 1020 Of Denmark
died 1055 York, Yorkshire, England
buried Galmanho Abbey, York, Yorkshire, England

father:
*Biorn (Bjorn) Ulfiusson (Estridsen)
born Of Denmark
died 1045/1049

mother:
*wife of Biorn (Bjorn) Ulfiusson (Estridsen)
born about 0980 Of Denmark
(end of information)

siblings:
Miss Biornsdatter born Abt 1010 Of Denmark
Asmund Bjornson born Abt 1047 Of Denmark died Abt 1065

spouse:
*Aelfled (Elfleda) of Bernicia
born Abt 1031(?) Of, Bernicia, Northumbria, England
married Abt 1033(?) Of Northumberland, England
(end of information)

children:
*Waltheof Earl of Northumberland born Abt 1046 Of Northumberland, England
died 31 May 1076 buried Jun 1076 Crowland, Lincolnshire, England
Osbeorne of Northumberland born Abt 1050 Of Northumberland, England
*Sybil Fitzsiward of Northumberland
born Abt 1048(?) Of Northumberland, England died 1070
(another source says born 1014)

biographical and/or anecdotal:

notes or source:
LDS