Alolan Vulpix’s Pokédex entry talks about how it is also known as “Keokeo.” What does this word mean?
Sun It exhales air colder than -58 degrees Fahrenheit. Elderly people in Alola call this Pokémon by an older name—Keokeo.
Its name origin:
The Alolan name Keokeo comes from keʻokeʻo (Hawaiian for white).
Source
It’s a Hawaiian word that means “the sound of whitecaps” or “the white sand”. It also can mean “spotless white”.