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Sigurd the Mighty, brother of Røgnvald, jarl of Møre in western Norway, joined T...
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Sigurd the Mighty, brother of Røgnvald, jarl of Møre in western Norway, joined Thorsteinn the Red from the Hebrides, to campaign on the Scottish mainland. Together they are credited, in Icelandic tradition, with conquering Caithness, Sutherland, Moray, and Ross. Encyclopedia.com: Orkney, jarldom