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.
Ulf the Brave Ulf the Brave ("Úlfr inn óargi") was a Norwegian hersir who lived in Namdalen in the eighth century CE. He was the father of Hallbjörn Half-Troll and Hallbera Ulfsdóttir, who was the mother of Kveldúlfr Bjálfason. Thus Ulf the Brave was the ancestor of the clan of Egill Skallagrimsson. He is briefly mentioned in "Egils Saga".