I once had a kitten move into my apartment. No more than 12 weeks old, she just moved in. So I took her to the vet to get fixed. She was young and feral, but decided she was not going to live under the house. She came right in when I was leaving one day, walked right past me, all around the perimeter of the place and then sat down by the front door and sized me up. I asked her her name, and she said, very very clearly, µ!