Family name Oggolter-Siekmann (Oggolter-Siekmann 
) , around the globe, is a very rare cognomen. The cognomen Oggolter-Siekmann is habitual in Western Europe, particularly Germany, where it is a very rare surname. Parts of the name also exists independently as a last name Oggolter, and a last name Siekmann.
| VARIANT | COUNTRY |
|---|---|
| Oggolter-Siekmann | Germany |