I've been thinking-

All the elf 'tribes' have one of the primal sources in their name but also another word that fits a little bit with that primal source, like MoonSHADOW, sunFIRE, skyWING...
You get the point.
But what about the other elves we don't know about? Like ocean and star.

This is the best I could come up with
(I also included special abilities of this tribe, like sunfire elves can do that weird vein-lava-glow thing and moonshadow elves go nearly invisible at the full moon)

Oceanfish elves: they have a spell where they can grow webing between their fingers and toes and gills.

Starnight elves: like moonshadow elves that can turn nearly invisible at night, starnight elves can blend in with the stary night sky.

Welp I got a bad name and a cool power plus a good name and a unoriginal power. Good God.
Comment what you think. What do you think they'll be?

~Ki-Ki