House Blackwater

House Blackwater of the Twins is a vassal house from the Riverlands, holding fealty to House Tully of Riverrun. Their lands are situated in the northern Riverlands straddling the Green Fork of the Trident. Their seat is the Twins, named for it's two near-identical keeps on either bank of the Green Fork, linked by a bridge.

House Blackwater was founded by lowborn sellsword-tuned knight Ser Bronn of the Blackwater, who rose to prominence just before and during the War of the Five Kings, after standing for Tyrion Lannister in his first trial by combat, and for his key role in obliterating most of Stannis Baratheon's fleet during the Battle of the Blackwater. He continued to serve Tyrion, and later Jaime Lannister, under the future promise of lands and a lordship. After being frequently snubbed and strung along by the Lannister brothers, he was finally awarded all that he was promised in 305 AC following the Great War. He was granted the dubiously vacant castle of the Twins, and the approval to found his own noble house, which he called House Blackwater after the bay where he carried out his most famous exploit.

House Blackwater is the direct successor to House Frey, which ruled the Twins for over six centuries before they were almost entirely wiped out in 303 AC by Arya Stark, as revenge for the Red Wedding.

House Blackwater's sigil is a flaming arrow, symbolising the flaming arrow that Bronn shot to ignite the wildfire cache during the Battle of the Blackwater. Their House words are "Steel for Gold".