Question: Eystein Haraldsson, was king of Norway from 1142 to 1157, "Øystein Haraldsson", is his name in which North Germanic language spoken mainly in Norway, where it is the official language?
Sentence (from "Sigurd II of Norway"): Sigurd II Haraldsson (or Sigurd Munn) (Old Norse: Sigurðr Haraldsson) (1133–1155) was king of Norway from 1136 to 1155.
Relevant evidence: No