There's also Terrana and Arena, Gaia and Solaria, etc. etc.
in reply to a message by Rachel Shaina
There's a lot more twin set names, such as Terrana (of the terrain, earth) and Arena (hall of Ares, mars); there's Gaia (earth goddess) and Solaria (sun goddess); Helios (sun god) and Luna (moon goddess), Ares (god of war) and Athena (goddess of war)... too many twin sets. Whatcha gonna do about it?