Question: Auisle or Óisle, was a Viking leader in Ireland and Scotland in the mid-late of which century, a nother Viking leader, Halfdan Ragnarsson, is sometimes considered a brother?
Sentence (from "Auisle"): He was the son of the king of Lochlann, identified in the non-contemporary "Fragmentary Annals of Ireland" as Gofraid, and brother of Amlaíb Conung and Ímar, the latter of whom founded the Uí Ímair dynasty, and whose descendants would go on to dominate the Irish Sea region for several centuries.
Relevant evidence: No