I personally dont change names, although I know quite a few people do when they adopt our cats. I have only once felt the need to change a fosters name, and that was Swiggy - normally, I put up with names i dont like (such as Martha), as it is better for the new owners to change it, but I couldnt live with a cat called Swiggy!! The rescue lady often changes names as they dont always stick in her head, so they get something new!!