Which Families Are in House of the Dragon?
"House of the Dragon" Episode 3 Introduces the Lannister Twins
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House Martell has a significant history with House Targaryen, as depicted throughout the book "Fire and Blood." Whether they'll play just as significant a role in "House of the Dragon" remains to be seen. House Martell and their kingdom of Dorne are pivotal in the early years of Targaryen rule, as they're the only great house to resist the Targaryen conquest in a meaningful and sustained way. That being said, those events happen a few generations before the civil war shown in "House of the Dragon." In fact, "Fire and Blood" notes that the only involvement House Martell has in that war is its refusal to take any part in it, so we might not see Martells very much on screen.