Family name Rohau (Rohau 
) , all around the world, is a very rare cognomen. The cognomen Rohau is habitual in Belarus, where it is a rare surname, and Brazil, where it is an extremely rare surname. Also, Rohau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rohau | Malaysia, Belarus, United States, India, Brazil |