Daeron Targaryen exists in “House of the Dragon!”
Despite fan speculation since Season 1 about the absence of Viserys (Paddy Considine) and Alicent’s (Olivia Cooke) fourth child, the HBO drama series revealed in the second episode of Season 2 — titled “Rhaenyra the Cruel” — that Daeron Targaryen not only exists, but he’s right where he’s supposed to be according to book lore.
During a heated exchange with his daughter, Otto (Rhys Ifans) mentions traveling down to Oldtown — which is the seat of House Hightower — to rally some power. He then makes reference to another grandson who might heed his advice better than Aegon (Tom Glynn-Carey) and Aemond (Ewan Mitchell) have been.