There is evidence to suggest that Óláfr had a fourth son, Guðrøðr. For example, the chronicle relates that, not long after Haraldr's succession, Haraldr visited the Hebrides and left control of Mann to Lochlann, his kinsman who governed the island in his place. In the following autumn, Lochlann and his supporters are said to have come into conflict with Hebridean supporters of Haraldr, and when the latter returned to Mann in the spring, the chronicle reports that Lochlann fled to Wales with all his men and his foster son, a youth identified as Guðrøðr, the son of a man named Óláfr. The ship they were travelling on is stated to have been wrecked upon the Welsh coast, and although Lochlann was able to make it ashore safely, he returned to the scene in an attempt to save Guðrøðr. According to the chronicle, Lochlann, Guðrøðr, and about forty others lost their lives in the shipwreck.