I thought i'd post this as an article, it was one of my answers to a previous question. It might help if youre stuck for a name. I will add to it later too.

This is a list of cats from cartoons and movies.

Figaro from Pinocchio.
Salem from Sabrina.
Felix.
Sylvester.
Tom, Toodles Galore, Toots, Tara, Butch, Topsy, George, Lightning from Tom and Jerry.
Garfield and Arlene.
Heathcliff.
Tiger from An American Tail.
Milo from Adventures of Milo and Otis.
O'Malley, Duchess, Marie, Berlioz, Toulouse, Peppo, Shun Gon, Hit Cat, Scat Cat, Billy Boss from Aristocats.
Mr. Tinkles, Calico, Kitty Galore, Catherine and Paws from Cats and Dogs.
Marcello, Jujube from A cat's tale.
Lucifer in Cinderella.
Si and Am in Lady and the Tramp.
Choo Choo, Benny, Top Cat, Spook, Fancy Fancy, The Brain in Top Cat.
Thomasina from The Three Lives of Thomasina.
Cosmic Creepers from Bedknobs and Broomsticks.

Some other names from cats in movies/cartoons/tv:
Jake, Rumple, Lucy-Belle, Amber, Fellini, Hobbie, Rufus, Oliver, Muffy, Catzilla, Mr. Bigglesworth, Coco, Orion, Princess Leah Lucky Buttons, Blackjack, Custard, Azrael, Bucky, Penelope, Sagwa, Scratchy, Snagglepuss, Snowball, Pussyfoot, Eek, Mooch, Snowbell, Sassy, Prince, Orangey, Fritz, Angus, Tonto, Azrael, General Sterling Price, DC, Mr. Jinx, Prince Lune, Jonesy, Fifi, Yuki, Baron, Muta, Niya, Natoru, Jiji, Furrball, Moon, Tibs, Lily, Natori, Isis, Winky, Mewsette, Robespierre, Jaune Tom, Meowrice, Madame Rubens-Chatte, Rhubarb, Clementine, Monkey, Bagpuss, Mr. Puss, Muffy, Lord Tubbington, Miss Kitty Fantastico, Mrs. Paw, Miss Puss, Charley cat, Bucky B. Kat, Vienna.

Some horror movie cats:
Catnip, Samuel, Missy, Magog, Baby, Balthazar, Chester, Church, Clarence, Claude, Clawdette, Azazel, Binx, Belasco, Catman, Cleopatra, Clovis, Dandello, Floyd, Ginger, Gabriel, General, Honey, Jezebel, Zeke, Wellington, Tullia, Tia Maria, Taco, Tabitha, Sylvia, Sugar, Spooky, Spider, Silky, Satan, Sculley, Puma, Pluto, Pepper, Muffin, Mr Kittles, Mr Squeaky, Mozart, Midnight, Marmalade, Levana, Kitty, Cuddles, Grimalkin, Mustache, Chloe, Mar, Masuka, Stella, Blanche.

Some cats from true stories:
Casper, The Bear, Ralph, Janet, Brewer, Shipley, Pablo, Bootsy, Daisy, Monty, Polar Bear, Bob, Norton, Cleo, Dewey, Ben, Oscar, Solomon, Toby, Fledermaus, Billy, Smokey, Larry, Tilly, Bumble, Conga, Tallulah, Jessi-cat, Hamish McHamish, Puss, Jonah, Homer, Tyfoon, Twinkle, Posey, Thomas, Katy, Carlos, Luis, Max, Toby Jug, Brumas, Prudence, Tabs, Tuppence, Ginny, Gemma, Jack, Clyde, KP, Peanut, Whisky, Maya, Henry, Chico, Molly, Munchie, Thula, Evie, Kit Kat, Chan, Lucy, Tubbs, Star, Lucky, Maru, Blackie, Tommaso.

Some cats from fictional stories:
Alfie, Jupiter, Velcro, Thistleclaw, Tao, Tabitha Twitchit, Miss Moppet, Mittens, Tom Kitten, Slinky Malinki, Scarface Claw, Ribby, Pixel, Orlando, Moxie, Mog, Growltiger, Firestar, Electra, Findus, Dinah, Alonzo, Bangs, Aristotle, Crookshanks, Dulcie, Demeter, Francis, Sam, Bluestar, Arlo, Polo, Hachi, Nana, Chibi, Charlie, Timba, Vati, Scourge, Momo, Chatran, Fireheart, Graystripe, Sandstorm, Tigerclaw, Lionpaw, Brambleclaw, Feathertail, Cloudtail, Crowpaw, Hawkfrost, Leafpaw, Squirrelpaw, Hollypaw, Jaypaw, Crowfeather, Leafpool, Squirrelflight, Redtail, Ravenpaw, Lionheart, Goldenflower, Tigerstar, Bumble, Darkstar, Harley, Flora, Floyd, Jet, Mitzi, Misty, Pip, Pixie, Scarlet, Victor, Storm, Ziggy.