Family name Mammai (Mammai 
) , in all the world, is a rare last name. The cognomen Mammai is habitual in India, where it is a very rare surname, Germany, and Nigeria, where it is an extremely rare surname. Much less frequently, Mammai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mammai | Germany, South Africa, Nigeria, United States, India |