
House Frey saw the end of its trueborn male line at the beginning of GOT season 7 when Arya murdered Walder Frey, used his face, and poisoned all of Walder’s male heirs as revenge for the Red Wedding. Related: Game Of Thrones: What Happened to House Mormont After The Battle of Winterfell


House Baratheon was reinstated by legitimizing a bastard, but the Freys and Martells, who had prominent members killed off and a lack of explicit leadership, had more ambiguous statuses. This was the case up until season 8 when Queen Daenerys legitimized Robert’s bastard Gendry Rivers, making him Gendry Baratheon, the Lord of Storm’s End. By season 5 of Game of Thrones when Stannis and Shereen Baratheon were killed after Renly and Robert, House Baratheon was seemingly extinct. In Game of Thrones’ finale, some houses’ fates were left ambiguous for the future, though still had a remaining family member which meant they hadn't fully died out. The most notable houses that went extinct in Game of Thrones, though not necessarily in the novels, were House Tyrell, House Bolton, the Mormonts, Umbers, and Karstarks.

In the fight for power on the Iron Throne, many families’ lines were extinguished through war, betrayal, or in the final battle against the white walkers. Season 8 of Game of Thrones saw the extinction of many noble houses, with some fates, such as that of the Freys and Martells, being more ambiguous than others.
