House Frost
Casa Frost
House Frost was one of the royal lines that ruled the North in the age of the First Men, before the Andals crossed the Narrow Sea.
It is remembered mostly for how it ends: at odds with the Starks, who eventually defeated them and put an end to their line.
Chapter 1
Kings of the North before the Andals
Books only
The Frosts held the title of King and belonged to the ancestry of the First Men, the same stock as the peoples who settled the North long before the Andals reached Westeros. No source attributes a seat or stronghold to them.
Their rivalry with House Stark ended the house altogether: the Starks defeated them and wiped out their line, closing their existence as a ruling stock in the region.