Which Families Are in House of the Dragon?
"House of the Dragon" Episode 3 Introduces the Lannister Twins
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House Westerling, from the Westerlands, will also appear in "House of the Dragon." Ser Harrold Westerling serves as the Lord Commander of King Viserys's Kingsguard. Other members of the Westerling family become embroiled in the war known as the Dance of Dragons.
In George R. R. Martin's novels, Robb Stark marries Jeyne Westerling, but the character's name and backstory were changed for "Game of Thrones."