Last name Fatzaun (Fatzaun 
) , all around the world, is a rare family name. The cognomen Fatzaun is characteristic of Western Europe, particularly Belgium, where it is a rare surname, Germany, where it is a very rare surname, and France, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Belgium, Germany, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Fatzaun | Brazil, France, United States, Belgium, Germany |