There was a guy who I had some contact with a few years ago. It was purely about politics. We met once and exchanged several emails. Over the three years we swapped a couple of emails, but not for over a year now.
Post state election, I emailed him with a few points about how
"Hi Adam," he replied, "hope things are good with you. Sorry, but I know many Adams and I can't quite place you. What is your last name?".
Somehow I don't think it would have been any different if he absorbed that my name is Andrew. I bet he knows plenty of them too.