I have a couple - have name changed
When we moved into our house, dh went next door to introduce himself to the neighbours. He came back shocked to have discovered that one side shared our quite unusual surname, and not only that, their son had the exact same first name and middle name as dh. There have been surprisingly few post mix-ups over the years!
When ds started nursery there was a little girl who followed him around constantly, to the point that the teacher told me how besotted she seemed to be with him! After a week or two I met her mum - who I recognised as she had been in my year at school 200 miles away and many years before (and was also an actress so I had seen her on screen a few times in the intervening years so she was easy to recognise!).
A few years ago dh and I went to Rome for a weekend. At the airport arrivals I had noticed a young man who was very flamboyantly dressed, and behaving in a "look at me" sort of way. A few hours later we were in the centre of Rome and I suddenly asked dh if he had noticed the young man at the airport (he had, you couldn't miss him!). As I said this, we turned a street corner and literally almost bumped into him!