Thanks to the Admiral, Bowmore's a very big name in Doskvol- it kinda makes sense you'd see it twice. They probably are related! (It's up to the GM, of course.) Besides, that's the kinda confusion that's fun. I ran a campaign where two players had someone named Flint as a connection, but described the character entirely differently. Coming up with why there were two different Flints, and revealing it as a twist later in the campaign, was a great time.