This is interesting, but i think it's not useful. If you had 100 Roberts in A Republican county and then another 100 Roberts in a Democratic county it looks like Robert is a neutral name, overall, for two counties but in reality it's solidly Republican in one and solidly Democratic in another.

So, without context, this means little. It's something to mention at a party, I guess where no one will look things up and take what you said as something insightful.