I also had/have a cat named L.T! It was short for “little tip” because he had just a tiny tip of white fur on his tail, otherwise a standard issue brown cat. The tip darkened away to nothing as he got older and he hops down stairs both front feet at once, so now his full name is Lieutenant Jack Rabbit.
One of my cats is called Jack, but her full name is Captain Jack Sparrow. My dad named her when he was drunk on the first day we got her, after we found her in our garage as a kitten. Idk why he chose that name but I loved it so much I instantly agreed and we overruled my mom’s attempts at rejecting it. I always make sure to tell vets her full name so they can put it in her file.
This was discounting the truly lazy ones where I just add -boy, -girl, and -cat to the end which adds an infinite supply of stupid names. We took Gyaos to a different vet than our normal one once (for a paw he cut on some glass he shattered) and they acted like Mouse was the weirdest nickname in the world. We didn't return to them ever again.
My great grandmother had a cat named Dirtyface that outlived her by about a decade. It was an orange cat with super dark ginger fur around it’s mouth and eyes.
We had several pets when I was a kid so here’s a short list of fun names: Patches (a calico), Tom (a one eyed outside cat that yowled at the door if you let him in), TicTac (because we called him ticky-tack because it sounded like kitty cat), Twinkle (a really sneaky bastard that like to swat at your feet from under the bed), Drack (short for Dracula because he liked to bite everyone), Misfit (because she liked to squeeze her body into places she couldn’t actually fit).
I rescued a cat a few years ago from a Walmart parking lot. His name is LittleFoot. He’s polydactyl so he has extra toe beans making his paws super big and I thought it was ironic to call him that.