Although Óláfr—like his father and grandfather—styled himself in Latin , his sons Haraldr and Magnús used the form . The latter style is nevertheless accorded to Óláfr by the chronicle in the record of his death. It was also accorded to members of the family by the English chancellery in thirteenth century, seemingly before its adoption by the Islesmen themselves. The title is the equivalent of the Gaelic ("king of the islands of the foreigners") first recorded in 989, a style almost certainly referring to Mann and the Hebrides.