House Frey

House Frey is a noble house of Westeros, although not one of the Great Houses. It is a vassal of House Tully of the Riverlands and holds its fealty to the Lord of Riverrun. Its current ruler is Lord Walder Frey. Their castle is known as the Twins, for its two identical keeps on either side of a river linked by a bridge.

The symbol of House Frey is two blue towers linked by a bridge. Their motto is not known.

In the books
In the Song of Ice and Fire novels, House Frey controls the Twins, two castles that hold the Crossing, the only bridge over the Green Fork of the Trident for hundreds of miles in either direction. House Frey is the northern-most house of the Riverlands, not far south of the loose border with the North, and has a history of enmity with House Reed, who control the marshes to the north of the Twins.

House Frey was a minor house of no notability until they bridged the Green Fork six centuries ago and defending the bridge with two wooden castles. Charging wayfarers for the use of the Crossing, they grew rich and influential, replacing the castles with strong stone keeps. Their growing wealth and influence saw them gain several vassal houses of their own.

Their military strength is formidable, allowing them to raise four thousand troops by themselves (or almost 10% of the total strength of the Riverlands). The current Lord Frey's father was involved in the scandal of the Whitewalls Tourney (when the Second Blackfyre Rebellion was halted in its tracks, roughly ninety years ago), leading to the current Lord Walder Frey being a cautious man, extremely reluctant to commit himself to any cause until the outcome is certain. During Robert's Rebellion he delayed the arrival of his army at the Battle of the Trident until Robert Baratheon had secured victory. For this, Lord Frey's liege, Hoster Tully, dubbed him 'The Late Lord Frey', a nickname which has stuck, to Walder Frey's fury.