Cognomen Mehau (Mehau 
) , globally, is a very rare family name. The cognomen Mehau is habitual in New Zealand, where it is a rare surname, Australia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Mehau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mehau | Australia, South Africa, United States, New Zealand, India |