Aeris

Auteur's Abecedarium mentioned the name Aeris under the letter A, alongside Arisian, Atlantis and Auteur himself. (PROSE: Auteur's Abecedarium)

Behind the scenes
Auteur's Abecedarium was a crossover with the non-DWU series The Crew of the Copper-Colored Cupids where the "Aeris Spiral" was established as the name for the region of the Omniverse that included the Prime Universe and Cupid Homeworld.