King Halfdanur hinn Svarti (Halfdanur the Black)
Halfdanur the Black was King of Vestfold and father of King Haraldur Halfdansson the Einkonungur. When he died in 860 N.Y., an election was held in Haugar at an assembly called the Haugathing to elect a new king. The nobles of Vestfold elected King Ragnvaldur hinn Heidhumhaeri (Ragnvaldur the Mountain-High) rather than Halfdanur's 10-year-old son, Haraldur, but the boy seized power anyway with the help of his uncle Guthormur Sigurdharson of Upplond (brother of Halfdanur the Black's wife, Ragnhildur Sigurdhardottir of Upplond).
Appears In: The Tale of Halfdanur the Black
Source: Based on the historical Halfdanr Svarti, father of the historical king who unified Norway, Haraldr Finehair.