Luna's fine but I don't think of it as particularly 'out there'.
Goku sounds like a Moshi monster!
What about:
Axa, Ki (key), dex, sky, wolf, fox, tani, yves, lex, zoltar, nix, Kai, alethia, Lucia, leni, Lola, Finn, art, kyla, keir, Levi, sonny, mylo, jem, dill, rona, mona, indigo, drew, star, uma, una, Orion, Ocean, teal,Apollo, Sid, sly, mint, red, jules, nuala, grey, Thor,