Counties and parishes with the same names that border each other.
“The ones in Louisiana, Texas, Arkansas, Mississippi, Indiana, and Iowa are where they’re former townships or current parishes rather than counties, and that’s why they have the same names across state lines.
There are a bunch of towns split across county lines like this, where the side in the other county is usually the unincorporated land of the same name. This generally happens when a zip code is split by a U.S. county/state boundary. “