House Frey of the Twins, sworn to Riverrun
House Frey of the Crossing is a noble house of the Riverlands. Their main seat is the Twins, a pair of castles on each bank of the Green Fork of the Trident that serves as a vital bridge across the river. The lord of the house is called the Lord of the Crossing. The strategic location of the Twins has allowed the house to become quite wealthy. Under their current lord, Walder Frey, they have grown greatly in both size and power. One of the most powerful bannermen of the Tullys, the House can field a thousand knights and three thousand foot. Their sigil is two blue towers united by a bridge on silver-grey, representing the Twins.
House Frey is one of the younger houses in Westeros, dating back some six centuries when its founder was awarded lands and nobility. The founding Frey had a vision of building a great bridge spanning the Green Fork of the Trident and began its construction. His grandson ultimately finished the bridge’s construction and built wooden keeps on both sides as well. Later generations replaced the timber keeps with identical stone keeps that were named the Twins. A large tower was constructed in the middle of the bridge and called the Water Tower. The Twins’ defensible construction and strategic location allowed the Freys to prosper by exacting tolls for passage across the river. The Freys grew into one of the richest and most powerful houses of the Trident. Their quick rise to prominence has caused other powerful houses to look down on them as upstarts. The Freys also became bitter rivals with their neighbors to the north, the crannogmen ruled by House Reed. House Frey aided Aegon the Conquerer during his War of Conquest and rebelled against King Harren the Black of Harrenhal. Afterward, the Freys joined the other river lords in swearing fealty to House Tully.
The current lord is Walder Frey, he has become famous for siring many children and surviving many wives. He is currently married to his eighth wife and has over a hundred descendants, base and trueborn. He has had twenty-two trueborn sons and seven trueborn daughters from his marriages, with an unknown number of bastard sons and daughters. He places a great emphasis on family loyalty, though his descendants jockey ruthlessly for his favor. Many Freys name their sons Walder and daughters Walda in hopes of honoring him.