Osbeorn Bulax's father governed on what king's behalf?
Osbeorn Bulax Osbeorn (died c. 1054), given the nickname Bulax, was the son of Siward, Earl of Northumbria (died 1055). He is one of two known sons — probably the older — of Siward. While it is normally assumed he was the son of Siward's Bamburgh wife Ælfflæd, it has been suggested by William Kapelle that Osbeorn's mother was not Ælfflæd. The nickname "Bulax" probably represents the Old Norse term for "Poleaxe".
Eutharic Eutharic Cilliga (Latin: "Flavius Eutharicus Cillica") was an Ostrogothic prince from Iberia (modern-day Spain) who, during the early 6th century, served as Roman Consul and "son in arms" ("filius per arma") alongside the Byzantine emperor Justin I. He was the son-in-law and presumptive heir of the Ostrogoth king Theoderic the Great but died in AD 522 at the age of 42 before he could inherit Theoderic's title. Theoderic claimed that Eutharic was a descendant of the Gothic royal house of Amali and it was intended that his marriage to Theoderic's daughter Amalasuintha would unite the Gothic kingdoms, establish Theoderic's dynasty and further strengthen the Gothic hold over Italy.