So far we've always changed the names of the cats we've adopted. Meow had no other name before we bought him from the pet store almost 14 years ago. I think Midnight & Bailey must have had other names from their foster family before we adopted them but I can't remember what they were. Our recent adoptions, Fae and Penny (short for Penelope), were previously named Buffy & Pamela. We're not into the name Buffy at all, and Penny seemed much more like a Penny than a Pamela. We're still working on teaching them their new names.