When my wife and I were ready to sell our first house after living there a few years, we were able to sell it pretty quickly. A very nice young couple made us an offer that we accepted.
The last name of this couple was Smith. In case you haven't realized it by now, since my name is Corey Smith, our last name is Smith as well.
We laughed at the idea that we were able to sell our first home to another couple buying their first home with the same last name. But, that ended up not being the funny part.
We found that the couple, at the time of the purchase, was still engaged. Her maiden name was Smith. So, a Smith marrying a Smith bought a home from the Smiths.