Mistaken identity can be a dangerous thing.
I have a fairly unusual surname (Kiteley).
Many years ago, soon after moving into a new house, we go a phone call and my wife answered it. It was from a women asking for me. My wife asked who it was and got the response "its Steve's girlfriend". My wife answered "Oh, this is his wife, can I take a message?". Apparently there was a long pause and the women hung up.
I had a little explaining to do!
Luckily when I checked the phone book there was another Steve Kiteley living a few streets away so the women must have gone through directory enquiries and been given the wrong number (and my wife, bless her, believed me after having a good laugh at me squirming and trying to come up with an explanation). I often wonder if my wifes reply to the caller ended up in my doppelganger losing his girlfriend.