I have known people's cats like that too, it seems like some have an internal clock, just like we do.
Yes, it was Nails, because of claws and also possibly because my mum and I liked an actor called Jimmy Nail. I also had a cat called Cantona too, but he got run over.
Wow. Sorry about Cantona. Reminds me of a retired footballer named Eric Cantona.
Yes, that's is exactly who that cat was named after.