It is unknown exactly what prompted the orcs to name their clan "Dragonmaw". It is apparent from Rise of the Horde that their name had been such for many years — long before the orcs encountered anything resembling dragons, the dragons being native to Azeroth. It is possible the Dragonmaw changed their name after they took command of the Red Dragonflight, or after Deathwing flew into the Dark Portal and secreted a clutch of eggs in Outland which, subsequently, hatched. However, this would nullify Rise of the Horde, in which the name of the clan is Dragonmaw — years before the idea of the Dark Portal was even devised. This may mean that there are or were dragons native to Draenor, or at the very least they existed in the form of mythological creatures in orcish culture — which would indicate that the Titans came to Draenor as well, which in turn indicates that the "reborn" Azeroth, freed from the Old Gods, predates Draenor. It is also possible that something similar to a Protodrake existed on Draenor at some point.
