Cognomen Barth-Söder (Barth-Söder 
) , in the entire world, is an extremely rare family name. The cognomen Barth-Söder is characteristic of Western Europe, particularly Germany, where it is an extremely rare surname. Parts of the name also exists independently as a last name Barth, and a last name Söder.
| VARIANT | COUNTRY |
|---|---|
| Barth-Söder | Germany |