My old cat, and beloved studio mascot, was named "Flash", although members of my family insisted on calling her "that thing that won't die".
My current cat is called "Mouse" because we caught her in a trap (a racoon trap, actually) and she would scurry away and hide whenever someone entered the room or turned on the lights.
After you keep her a while, something will inspire you and the name will present itself, although I've always thought the word "Vivace" would be a cool name for a cat. Of course, if it's a somewhat lethargic cat that wouldn't make any sense