What you're describing is a form of clairvoyant dowsing. It's a relatively new and not very common form of dowsing. Similar uses include predicting the sex of a child, choosing lottery numbers and similar to what you have tried, using alphabet sheets to write out words and sentences. It could be that this man and you share a connection that is so strong as to share a psychic bond.
I welcome your thoughts, let me know if you want to talk more