Harald I Fairhair is portrayed by medieval Norwegian historians as the first King of Norway. According to traditions current in Norway and Iceland in the twelfth and thirteenth centuries, he reigned from c. 872 to 930. Supposedly, two of his sons, Eric Bloodaxe and Haakon the Good, succeeded Harald to become kings after his death.
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Olaf Tryggvason (960s – 9 September 1000) was King of Norway from 995 to 1000. He was the son of Tryggvi Olafsson, king of Viken (Vingulmark, and Rånrike), and, according to later sagas, the great-grandson of Harald Fairhair, first King of Norway. He is numbered as Olaf I
Olaf is seen as an important factor in the conversion of the Norse to Christianity.
Eric Haraldsson (Old Norse: Eiríkr Haraldsson, Norwegian: Eirik Haraldsson; c. 885 – 954), nicknamed Eric Bloodaxe (Old Norse: Eiríkr blóðøx, Norwegian: Eirik Blodøks), was a 10th-century Norwegian ruler. It is widely speculated that he had short-lived terms as King of Norway and twice as King of Northumbria (c. 947–948 and 952–954).
Haakon Haraldsson (c. 920–961), also Haakon the Good and Haakon Adalsteinfostre, was the king of Norway from 934 to 961. He was noted for his attempts to introduce Christianity into Norway.
Harald II Greycloak or Grey-hide literally translated (c. 935 – c. 970) was a king of Norway from the Fairhair dynasty.
Harald acquired his nickname "Gray-hide" after an encounter with the crew of an Icelandic merchant ship which carried a large load of vararfeldir, a type of faux fur made from sheep's wool.