Bahamut is known as the Platinum Dragon and is considered to be the patron saint of all dragon kind. He is married to Tiamat, even though she is fully ensconced with control and darkness. As such, the two are enemies in their philosophies. Bahamut ascended long ago to the High Heavens, while Tiamat descended into the Depths of Hell.
Some legends state that Bahamut was the first dragon, while others argue that it was Tiamat. Both followers believe the same ideas, though there are a few that believe that neither are the firstborn dragon. Their beliefs state that Onth'ralith is the father of all dragons, but for most this is but a simple theory. Only a few ancient texts even mention Onth'ralith, and even so, they do so in passing.