It is possible that Framsburg was founded shortly after the Éothéod, the ancestors of the Rohirrim, arrived in their new land in the far north of Rhovanion between the Misty Mountains in the west and the Forest River in the east in T.A. 1977, during the rule of Frumgar, but it was presumably named after his son Fram, the famed slayer of the Dragon Scatha. It was the only fortified burg of the Éothéod, while they lived in the far north of Rhovanion.
It is possible that Framsburg was abandoned circa T.A. 2510 when Eorl the Young led the Éothéod south to settle in Calenardhon, the land later known as Rohan.