Ivar the Boneless was the brother of which 9th century Viking chieftain?
Ubba Ubba, also known as Hubba, Ubbe, and Ubbi, was a mid-ninth-century Viking chieftain and one of the commanders of the Great Army, a coalition of Norse warriors that in AD 865 invaded the Anglo-Saxon kingdoms of Northumbria, Mercia, East Anglia and Wessex.
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".