Originally Posted by
treuhavik
Aye. In fact, Midgarsormr is supposedly the first dragon and sired seven sons.
Bahamut might make sense if you haven't finished coil, but is that the real Bahamut or a aethereal manifestation of him? Actually, considering that the coil storyline ended before patch 2.5a, even his primal form is dead. Besides, even if Bahamut had never been entrapped by the Allagan in the 3rd astral era, he'd still be in Meracydia with his people dragon horde, which is not in the realm of Eorzea.
So, while Bahamut was probably one of Midgardsormr's children, he's not one of the sons he references being in Eorzea.