Sigurd's son Guthorm ruled for a year and died childless. Rognvald's son Hallad then inherited the title. However, unable to constrain Danish raids on Orkney, he gave up the jarldom and returned to Norway, which "everyone thought was a huge joke". Torf-Einarr then succeeded in defeating the Danes and founded a dynasty which retained control of the islands for centuries after his death. Smyth (1984) concludes that the role of the brothers Eysteinsson lacks historical credibility and that Torf-Einarr “may be regarded as the first historical earl of Orkney”.