The "Orkneyinga saga" states that Einarr was one of six brothers, the others being: Hallad, Hrollaug, Ivar, Hrólfr, and Thorir the Silent. The three eldest, Hallad, Einarr and Hrollaug, were natural sons of Rognvald, and were "grown men when their brothers born in marriage were still children". Ivar was killed on an campaign with King Harald Finehair, which resulted in the "Norðreyar" being gifted to his family as compensation. Hrólfr "was so big that no horse could carry him", hence his byname of "Göngu-Hrólf" ("Hrólf the Walker"), and he is identified by the saga writers with Rollo, ancestor of the Dukes of Normandy. Thorir the Silent was Rognvald's third son by his marriage to Ragnhild.