Last name Mangau (Mangau 
) , all over the world, is a rare cognomen. The surname Mangau is characteristic of Romania, where it is a rare surname, the Democratic Republic of the Congo, and South Africa, where it is a very rare surname. More prevalently, Mangau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mangau | Romania, South Africa, India, France, Democratic Republic of the Congo |
| ioan mangau Romanian politician from Fildu de Jos, Sălaj County, RO (b. 1960) |
|