What was the name of the father of the Norwegian king at the center of the Saga of Harald Fairhair?
Halfdan the Black Halfdan the Black (Old Norse: "Halfdanr Svarti") (  810 –  860 ) was a ninth-century king of Vestfold. He belonged to the House of Yngling and was the father of Harald Fairhair, the first king of Norway.
Óláfs saga helga Óláfs saga helga or the Saga of St. Olaf, written in several versions, is one of kings' sagas ("konunga sǫgur") on the subject of King Olaf Haraldsson the Saint.