Cognomen Katmann (Katmann 
) , in the world, is a very rare surname. The last name Katmann is habitual in Estonia, where it is quite a rare surname, Germany, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Estonia, Germany, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Katmann | United States, Germany, Nigeria, Estonia |