One of the single most interesting pieces of lore for me are the origins and lives of "The First Brood". I just saw that Bahamut has the title "The Dawn Wyrm" and that Tiamat has the title "The Dusk Wyrm", but I'm wondering about the rest of the First Brood?

Obviously we don't know anything about Azdaja or Vrtra (yet, I hope), but what about Hraesvelgr, Ratatoskr and Nidhogg? Do they also have any titles?