Azulon, simply known as Fire Lord Azulon, is a posthumous villain in Avatar franchise. He is the father of both Iroh (Izumi's paternal granduncle) and Ozai (Izumi's paternal grandfather), the father-in-law of Ursa (Izumi's paternal grandmother), the grandfather of Zuko, Azula and Lu Ten, and also the paternal great-grandfather of Izumi.