A Japanese trademark filing has revealed potential names for the mascot Legendaries of the upcoming 3DS titles Pokémon Sun and Pokémon Moon; “Solgaleo” (ソルガレオ) and “Lunaala” (ルナアーラ) were both submitted for registration.
Solgaleo definitely seems to combine sol/solar with something, possibly “leo” for lion.
Lunaala we are still researching, but the base of luna/lunar is evident.
UPDATE: A working theory is that this could be hinting towards Sun and Moon being based in Spain. In Spanish “luna” means moon and “ala” means wing, thus Lunaala could be some sort of winged Legendary. “Sol” also means sun in Spanish and “león” means lion. Back in 2014 game director Junichi Masuda visited Spain in person and reported the trip on his blog. Coincidence?
A third trademark filing was for “Gigareki”, but it is unknown whether or not it is related to the two, the name of a Pokémon or an entirely separate product.