This piece is a reference guide from Collider tracing the Targaryen family tree across the "Game of Thrones" universe, spanning "House of the Dragon," "A Knight of the Seven Kingdoms" and the source book "Fire & Blood". It's aimed at fans who struggle to keep track of the dynasty's tangled bloodlines, given the franchise's recurring names, intermarriage and overlapping timelines across prequels and the original series. The guide matters as a companion resource for viewers following the expanding "Thrones" franchise as new spin-offs continue to draw on the same family history.

The article profiles key early Targaryens, starting with Aegon I "the Conqueror", who united the Seven Kingdoms and fathered Aenys (with sister-wife Rhaenys) and Maegor (with sister-wife Visenya). It goes on to detail Visenya and Rhaenys themselves, and Rhaena Targaryen, King Aenys I's daughter, who married her uncle Maegor I and later moved to Harrenhal, where her dragon Dreamfyre laid the clutch of eggs later seen in "House of the Dragon" Season 3. The guide notes Aegon I's story will also feature in an upcoming "Aegon's Conquest" prequel film.