The parents listed for this individual are speculative and may not be based on sound genealogical research. Sources to prove or disprove this ancestry are needed. Please contact the Profile Manager or leave information on the bulletin board.
Siward's parents are unknown. Bjorn is his father passed down through folklore.
p. (unknown / unproven folklore) Bjorn Bearsson
sister: (disputed) Sybill/Suthen m. Duncan I of Scotland
Attempting to deduce some trace of facts in the folklore of Siward's ancestry, historian Timothy Bolton  suggests that Siward's father Bjorn may be a cousin of Ulf who married the Danish Queen Astrid. Essentially, however, Siward's parents are unknown. He has previously been shown as the son of Æstriðr Sveinsdóttir and an Uswulf Ealdorman. Based on the absence of any factual basis for this connection, the linkage has been removed.Day-1904 16:02, 16 June 2017 (EDT)
There's too many profiles for Siward, Earl of Northumbria, and it looks like folklore hijacked the line... when there's no proof his father was Bjorn or Ulf the Earl. Those lines -- Ulfsson and Thorgilsson -- also have chronic problems with other family members who further corrupt the lineage.... like Sybill/Suthen.
To avoid a dangerous merge ... Can we just merge all the Siwards into Northumbria-1, follow protocal and put patrynomics in the Middle Name field, use the House for LNAB/CLN and ... cut the main ID for Siward off from any parents? ... The different ideas can be stated it in the bio, using links to point to the myriad of parents, not-so-well-maybe-sibling/mothers, etc...