:eek: 
Poor kitty. Good for you.
I like Gerald. Or Donald. Or Herbert.
I often “name” neighborhood cats after their appearance (there’s a black-and-white I call Moe because, from head on, it looks like Moe Howard of The Three Stooges). Alas, I see nothing distinctive in your cat (though his contemplative mien makes him worthy of something like Aristotle).
Though I’ll probably smack myself later for suggesting this, how about Ironside, after the paraplegic 60s TV detective? From your description, it is clear that he is one tough pussy (oxymoronic pun intended).
Or maybe Hardscrabble.
Claude means “lame one”.
And when you get him neutered, you can say you had him de-Claude. 
Oh goodness, is he ever a handsome and regal looking lad. Mega karma points to both you and your sister for taking care of him.
He looks like a Charlemagne to me (or Charlie, for short), or perhaps an Alexander the Great. A cat like that deserves no less than a conqueror’s monicker.
Dragster.
I’m partial to Jeoffrey.
Sailboat
Gustavus Adolphus, Gustav Vasa, or Carl Gustav, all Swedish kings.
Nickname? Gus, of course. 
You could name him after someone who’s been caught using steriods. But I don’t keep up with sports, so I don’t have a list of names.
From a completely different angle, Barrymore has an august ring to it.
Oooh, or Lionel!
Sailboat and Beware of Doug,
I have a cat named Geoffrey. Also, my Swedish great great grandfather was named named Carl Gustav. Seriously.
Not that anyone cares…
How about Rex? It means king, and you don’t have to cut it short before you can use it. (I agree with the Gaffer about names.)
He sure is a handsome fellow. Congratulations!
How about Reginald?
I think Rex is an awesome name Cheez_Whia.
He looks like a “Winston” to me.
Very pretty, dignified looking cat.
The earlier suggestion of Claude reminds me of Emperor Claudius.
Alexei [Romanov].
Franklin or Delano [Roosevelt].
Jabba [the Cat].
Why name something that won’t come when you call it?
Exactly why I address all cats as kitty. But every cat deserves a name, even if you don’t use it much.
Gamaliel. A great name ruined by a crappy president.
Brewha,
We meet at last! When I brought my alter ego here with me last year, I had never seen your username despite extensive lurking, otherwise I might have considered making up a new one. Wasn’t trying to semi-hijack yours!
And how interesting that the thread happens to be name-related.
I’m with you and several above – all the “Cl” names appealed to me, and I liked Claxton best. He definitely looks like an illustrious man. I first thought “Archimedes”, but I’m weird.
“Mafioso”, obviously.