Surname Sonau (Sonau 
) , around the world, is a very rare family name. The last name Sonau is characteristic of Germany, where it is a very rare surname, and India, where it is an extremely rare surname. Much more prevalently, Sonau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sonau | United States, Germany, Malaysia, India |