Asgorath

Io is the chief deity worshipped by dragons. The draconic pantheon of gods consists of the leader Io, as well as Aasterinian, Bahamut, Chronepsis, Faluzure, Garyx, and Tiamat.

Nathair Sgiathach is also said to be an offspring of Io, though he has no involvement with the rest of the draconic pantheon.