6) Tyraxes

Rider: Joffrey Velaryon
We only know Rhaenyra’s youngest son by Laenor, Joffrey (seen in the middle above), has a named dragon because Daemon lists off the Blacks’ draconic assets. In the books, Tyraxes hatched around the time of Joffrey’s birth or soon after, which will likely make him too young to ride when House of the Dragon returns.