In episode eight, viewers got their first glimpse of Aegon and Helaena's two oldest children, the twins Jaehaerys and Jaehaera. In Martin's book, Jaehaerys has six fingers on his left hand and six toes on each foot. In "House of the Dragon," they're toddlers when their father is crowned, though in the books, they're 6 years old. In the books, Aegon and Helaena also have a third child, Maelor, though it's not clear if that young boy will appear in the show as well. In the book, Jaehaera bonds with the dragon Morghul and Jaehaerys is bonded with the dragon Shrykos. Maelor has an unhatched dragon egg.