One time someone from the USA contacted me on Facebook because he has the same surname, to see if we were related. We weren't, but his great-grandparents were from my hometown and emigrated to the USA around 1900 or so (before WW I, anyway).
Fun fact, in 1998, I did an internship at a local hi-fi shop and met a guy who actually had the exact same name as my father. But wait, there's more: He also was in the same line of work as my father. He did not look anything like my father, fortunately, that would have freaked my out in a big way.