What was the name of Gudrød Bjørnsson's grandfather, who is also known as the first King of Norway?
Gudrød Bjørnsson: Gudrød Bjørnsson was the son of Bjørn Farmann, the king of Vestfold, and a grandson of Harald Fairhair. Harald Fairhair: Harald Fairhair (Old Norse: "Haraldr Hárfagri", Norwegian: "Harald Hårfagre", (literally "Harald Fair-hair") ;  850 –  932) is remembered by medieval historians as the first King of Norway.
Harald Fairhair