Family name Mardiat (Mardiat 
) , across the world, is a very rare surname. The surname Mardiat is habitual in Estonia, where it is quite a rare surname, Indonesia, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Indonesia, Estonia, and the United States. Very seldom, Mardiat is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mardiat | Nigeria, United States, Estonia, Indonesia, Morocco |