Sorry Barb, but I'm really not keen on R.C. Because if you say it quickly, well, try it. And that's what everyone who hears you calling him will think you named him. ;)
I like Norm, for Mr. Hacking in my link above. Or what about Jaffa? Jaffa orange - Wikipedia I do know someone who named their orange cat Shamouti, another name for Jaffa.