My cat (featured on my tilde page, http://tilde.club/~jr/, naturally) is named Cardigan. It usually gets a surprised/pleased reaction from people, which I enjoy.
We picked the name before we picked the cat, but it suits him very well. He has tabby and white markings that make it look like he's wearing a sweater with the sleeve rolled up on one side. Everyone always asks if this is how he got his name, so clearly it was meant to be.