Family name Manthau (Manthau 
) , around the globe, is a very rare surname. The last name Manthau is habitual in Germany, where it is a very rare surname, Canada, where it is an extremely rare surname, and Brazil. More frequently, Manthau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Manthau | Brazil, India, Democratic Republic of the Congo, Germany, South Africa |