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".
Louis the Stammerer Louis the Stammerer (French: "Louis le Bègue" ) (1 November 846 – 10 April 879) was the King of Aquitaine and later the King of West Francia. He was the eldest son of emperor Charles the Bald and Ermentrude of Orléans. Louis the Stammerer was physically weak and outlived his father by only two years.