<human>: Can you condense the text into a few key points?

Obligatory "this didn't actually happen today," it happened a few years ago.

I'm a teller at a credit union in Ohio, and my family is from the south (I grew up in the Midwest my whole life). I inherited a surname that's quite uncommon (never met another or heard of another) for white southerners, but is somewhat common for African Americans.

When this occurred, I was about 17 and still pretty naïve. An African American man walked in and I began helping him (they give us their account number first, so he didn't say his name) when I realize we have the same last name. I was quite excited and I let him know that we have the same last name. As I'm looking at him, he has his work badge still around his neck and I let him know that my Dad also works for the same company (Fortune 100). He asks my dad's name and says he knows of him, he's his boss (not direct boss, but somewhere in the chain of command) then begins to tell me that he is from the same small town in North Carolina and his family has always lived there. 

It took me a long time after talking to him to recall that slaves often inherit their owners' surname. He was a little unfriendly if I recall so there's a chance he didn't like my dad or was well aware of the history.
<bot>: I pointed out to a member of my credit union that my family probably owned his family at some point (accidentally, obviously).