I'm surprised Cassie even knows her name because I call her so many other things... a friend calls her Cassie Lassie, which got shortened to Lassie and then to Lass; she gets called Madam when she is being mischievous; Bug- I have no idea where that came from ("Hi, bug!"). A lot of the time she gets called the Princess because she eats before I do, she generally walks in front of me when I am going from room to room, and at night she is so funny, she expects me to let her settle into her sleeping spot before I lie down. Yes, ma'am. My nephew's cat Winston was like that too- he had a billion permutations of his name and he knew all of them referred to him. (and he was equally good at ignoring each one when he wasn't getting what he wanted)