The word Mencho has its roots in the Aragonese language, which is a Romance language spoken in the Aragon region. It's a pretty old language, with roots dating back to the Middle Ages. Over time, the word Mencho evolved to become a term of endearment, similar to buddy or pal.
But here's the thing: Mencho can also be used as a surname, particularly in Spain and Latin America. It's not a super common surname, but it's still pretty interesting. And who knows, maybe you've got some Mencho ancestors out there somewhere!