About Osbeorn Bulax
The Medieval Lands project describes:
1. BJORN Bearsson . The Vita et Passio Waldevi Comitis records “Ursus” as father of “Spratlingus” who was father of “Ulsius”, father of “Beorn cognomento Beresune…filius ursi…Dacus natione”.
m ---. The name of Bjorn's wife is not known.
Bjorn & his wife had [two] children:
a) SIWARD (-York 26 Mar 1055, bur Galmanho Monastery [=York St Mary's]). The Vita et Passio Waldevi Comitis names “Siuuardus” as son of “Beorn cognomento Beresune…filius ursi…Dacus natione”. A Dane, he may have come to England with the invasion of Knud of Denmark in 1015. He was recognised as Earl of Northumbria after the murder of his wife's uncle in 1041. The Annales Dunelmenses record that "comes Siward" invaded Scotland with a large army in 1046 and briefly expelled "rege Macbeod", the king recovering his realm when Siward withdrew. He actively supported Edward "the Confessor" King of England against Earl Godwin and his sons in 1051. The Annales Dunelmenses record that "Siwardus" put "Macbeth" to flight in 1054 and installed "Malcolmum rege" in the following year.
m ÆLFLED, daughter of EALDRED Earl of Northumbria & his [first/second] wife ---. Simeon of Durham names "Elfleda daughter of Earl Aldred" as wife of Siward and mother of Waltheof. Siward & his wife had two children:
i) OSBEORN (-killed in battle 27 Jul 1054). The primary source which confirms his parentage has not yet been identified. He was killed fighting King Macbeth of Scotland with his father.
ii) WALTHEOF (-executed St Giles's Hill, Winchester 31 May 1076, bur Crowland Abbey383). Florence of Worcester records that "Waltheofum Siwardi ducis filius" went with King William to Normandy 21 Feb . Simeon of Durham records that "Waltheu the son of earl Siward…by Elfleda daughter of Earl Aldred" was installed as Earl of Northumberland after the earldom was confiscated from Gospatrick [in 1072]. His parentage is recorded by Roger of Hoveden. Matthew of Paris specifies that he was the son of Siward, of Danish origin. Earl of Huntingdonshire and Northamptonshire .