Around the globe, Oggolter-Siekmann (Oggolter-Siekmann 
) is an extremely rare unknown gender first name. Much more prevalently, Oggolter-Siekmann is the last name as well as the forename. Parts of the name also exists independently as a last name Oggolter, and a last name Siekmann.
| VARIANT | COUNTRY |
|---|---|
| Oggolter-Siekmann | Germany |