Love these names! Great thread. Ok, here's some of mine.
Phanamus (yellow pineapple? vt). It's a Thai boy's name that means "sun," or so the Internet tells me...
Cinnabar (red and copper/silvery rosetail). A red mineral, an ore of mercury.
Star Bright (orange and turquoise PK). Well, cuz he's a little bright star swimming around his tank
Aurora (bluish turquoise white EE). For his colors, reminds me of the northern lights when I lived in Alaska.
Pegusus (marble DT) his first small tank (he couldn't swim well when I first got him) was under a big picture of Pegusus, and I noticed he looked like the picture!
Endymion (cellophane DT) after a character in a a poem by John Keats. AKA "wisp"
Poseidon (blue CT) after the Greek god of the sea
Drafon (blue and red HM) just liked the name. He has a Balinese dragon ornament in his tank.
A few more I'll add later....