House Stark
House Stark is one of the Great Houses of Westeros, ruling the North from Winterfell. Their sigil is a grey direwolf on a white field, and their words are "Winter Is Coming." Key members include Eddard, Catelyn, Robb, Sansa, Arya, Bran, and Rickon Stark.
House Lannister
House Lannister controls the Westerlands and is among the wealthiest families in the realm. Their sigil is a golden lion on a crimson field, and their motto is "Hear Me Roar." The main branch includes Tywin, Cersei, Jaime, and Tyrion Lannister.
House Targaryen
House Targaryen is the former ruling dynasty of Westeros, known for its dragons and Valyrian heritage. Their sigil is a red three-headed dragon on a black field, and their words are "Fire and Blood." Key members include Viserys, Daenerys, and Rhaegar Targaryen.
For a broader overview of the series and its many houses, see the Game of Thrones Wikipedia page.
