Cognomen Estephanus (Estephanus 
) , in all the world, is an extremely rare last name. The cognomen Estephanus is characteristic of Sub-Saharan Africa, particularly Nigeria, where it is an extremely rare surname. More frequently, Estephanus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Estephanus | United States, Nigeria, Indonesia |