Osbeorn Bulax's father governed on what king's behalf?
Siward, Earl of Northumbria Siward or Sigurd ( or more recently ; Old English: "Sigeweard") was an important earl of 11th-century northern England. The Old Norse nickname "Digri" and its Latin translation "Grossus" ("the stout") are given to him by near-contemporary texts. Siward was probably of Scandinavian origin, perhaps a relative of Earl Ulf, and emerged as a powerful regional strongman in England during the reign of Cnut ("Canute the Great", 1016–1035). Cnut was a Scandinavian ruler who conquered England in the 1010s, and Siward was one of the many Scandinavians who came to England in the aftermath of that conquest. Siward subsequently rose to become sub-ruler of most of northern England. From 1033 at the latest Siward was in control of southern Northumbria, that is, present-day Yorkshire, governing as earl on Cnut's behalf.
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.