Hotaru means "firefly" in Japanese. I thought it was appropriate, as I was a Japanese major and will always be a Browncoat. I think it told me that the name was taken already, so I added -chan, which is a diminutive that essentially turns the meaning into "little firefly."
Sontaikle, I'm so glad that you posted...I assumed that your name had to be somehow associated with Sonic after you declared your car to be "Sonic blue" in the geek thread I made over the summer, but I couldn't quite figure out how