NORTHUMBRIA Siward Bjornsson

Bef 1015 - 1055  (> 40 years)

• Name	NORTHUMBRIA Siward Bjornsson
  Birth	Bef 1015	Scandinavia
  Gender	Male
  Death	1055	St Olave, York, Yorkshire, England
  Notes	Siward Digera, eller Sigurd Digre eller Sigurd Danske (død 1055), var jarl av Deira 1032–1043, og jarl av Northumbria 1042–1055. För mer info se https://no.wikipedia.org/wiki/Siward_av_Northumbria Biography Siward, Earl of Northumbria[1][2] b. ante 1015 Denmark[3] d. 26 Mar 1055[4] bur: St Olaf. Galmanho ( Galmanho Monastery). York[5][6] Titles After 1041 - 1055: Earl of Northumbria[5] Disputed Parents and Siblings Siward's parents are unknown. Bjorn is his father passed down through folklore. p. (unknown / unproven folklore) Bjorn Bearsson[7] 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 [5] 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) Marriage and Issue m. Godifu (unproven) Osbeorne / Osbeorn Bulax (d.27 Jul 1054)[6][5][8] m. Aelfled. Issue:[1][9][10] (unproven) Osbeorn Bulax (d.27 Jul 1054)[6][5][8] Waltheof of Bamburg[1] (disputed) Sybill/Suthen m. Duncan I of Scotland Sources ↑ 1.0 1.1 1.2 Simeon of Durham ↑ Old English: Sigeweard; Siward Biornsson (Medieval Lands); Alias: Grossus (the Stout)[citation needed]; Wikipedia: Siward, Earl of Northumbria ↑ may have arrived in England with the invasion of Knud of Denmark in 1015 (Medieval Lands). ↑ fmg.ac ↑ 5.0 5.1 5.2 5.3 5.4 Wikipedia: Siward, Earl of Northumbria ↑ 6.0 6.1 6.2 Florence of Worcester ↑ Vita et passio Waldevi comitis. (Vita Waldevi). See Wikipedia and Medieval Lands. ↑ 8.0 8.1 Wikipedia: Osbeorn Bulax. eldest son "Osbjorn" is normally said to be Aeffled's son, but he could be Godifu's instead. ↑ Roger of Hoveden ↑ m. ABT 1033[citation needed] See also: Anglo-Saxon Chronicle Chronicle of John of Worcester "England, AngloSaxon nobility: Northumbria." Medieval Lands v.3. fmg.ac. William of Malmesbury Henry of Huntingdon Orderic Vitalis Stevenson, J., ed. (1855). "Simeon's account of the Siege of Durham." The historical works of Simeon of Durham ... (Vol.3, Part 2, pp765). Google eBook. Symeon of Durham Wikipedia: Siward, Earl of Northumbria
  Person ID	I59201	Freeman-Smith
  Last Modified	27 Jan 2026

  
  

  Family	BERNICIA Ælfflæd,   b. Abt 1010   d. 1060, Northumbria, England (Age 50 years)
  Children	1. HUNTINGTON Waltheof,   b. 1046, Northumberland, England d. Abt 31 May 1076, St. Giles Hill, Winchester, Hampshire, England (Age 30 years)  [Father: natural]  [Mother: natural]
  Family ID	F26323	Group Sheet  |  Family Chart
  Last Modified	27 Jan 2026