He died in 934, leaving a son Anlaf (Olafr), Godfredsson or Godfreyson.
His son Olafr Tretelgia withdrew to Vermland, which he brought into a state of cultivation, though he was subsequently sacrificed by his subjects in a time of famine.
The sons of Olafr Tretelgia moved westward into Norway, and if we may trust the saga, the Swedish kingdom never again came into the possession of their family.
On his subsequent journeys to Sweden Ansgar encountered kings called Olafr and Onundr. He appears to have met with considerable immediate success in his missionary enterprises, although there is no evidence to show that the churches he founded long survived his death, and no serious mission seems to have been attempted for more than a century afterwards.
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