Bright and energetic, Neon seems like it would be a modern coinage, borrowed from neon lights.
Instead, Neon is found way back in Ancient Greece. The lights are named for neon gas, discovered in 1898 and named because it was new.
Neon was also used as a given name as recently as the 1940s and 1950s, mostly for boys.
Today parents would probably opt for Neo or Nova, but Neon feels both vintage and space age - an interesting combination!