Haraldine dynasty
The Haraldine dynasty refers to the descendants of Harald Hand-Free, the first historical high king of Skyrim. The Haraldine monarchs after Harald were Hjalmer, Vrage, Gellir, and Borgas. Their line was extinguished with the death of Borgas in 1E 369.
Ostensibly, the dynasty was a branch of the Ysgramorings. Harald himself is claimed to be 13th in the line of Ysgramor on a memorial plaque at the Palace of the Kings in Windhelm.