My rl name starts with Chat and I introduce myself as such most places. It's pronounced differently though, since it's based on a French word. The Ch has an Sh sound. And yes, I know what that sounds like...
Ah, I mentioned it's shortened. My name is Chatoyer:
Etymology. From French chatoyant, present participle of chatoyer (“to iridesce, like a cat's eye”), from chat (“cat”, because of the reflective qualities of a cat's eye).