Saul, the Nidoking. Double meaning here. The first is a reference to Saul Tigh from the new Battlestar Galactica. The second meaning references the first King of Israel, King Saul. Get it, Nidoking/King Saul? Yeah, I'm clever
Tiamat, the Salamence. I've always like the name Tiamat for a dragon, named after the Babylonian dragon goddess of creation.
Kenix, the Torterra. Not much to say with this one, I just thought it fit.
Melusine, the Lapras. Named after a feminine spirit of fresh waters in sacred springs and rivers in European folklore.
Gabriel, the Zangoose. A friend of mine had a ferret named Gabriel, so I opted for that name when I saw that Zangoose's species name was the Ferret Cat Pokemon.
Eris, the Froslass. I believe I named her after one of the coldest bodies in the solar system.
I also have a Charizard I've had on my team since FireRed that I just recently retired. His name is Ronson, named after Ronson lighters.