Gywn

Dark Souls Lore: Seath The Scaleless

And Seath the Scaleless betrayed his own, and the Dragons were no more.

Dark Souls Lore: Gywn, Lord of Cinder

Then from the dark, they came, and found the Souls of Lords within the flame.

Dark Souls Lore: Dragons & The Age of Ancients

In the Age of Ancients the world was unformed, shrouded by fog. A land of grey crags, arch-trees and Everlasting Dragons.