Ivar the Boneless was the brother of which 9th century Viking chieftain?
Ivar the Boneless Ivar the Boneless (Old Norse: "Ívarr hinn Beinlausi" ; ) was a Viking leader and a commander who invaded what is now England. According to the "Tale of Ragnar Lodbrok", he was the son of Ragnar Lodbrok and Aslaug. His brothers included Björn Ironside, Halfdan Ragnarsson, Hvitserk, Sigurd Snake-in-the-Eye and Ubba.
Ulf the Brave Ulf the Brave ("Úlfr inn óargi") was a Norwegian hersir who lived in Namdalen in the eighth century CE. He was the father of Hallbjörn Half-Troll and Hallbera Ulfsdóttir, who was the mother of Kveldúlfr Bjálfason. Thus Ulf the Brave was the ancestor of the clan of Egill Skallagrimsson. He is briefly mentioned in "Egils Saga".