Family name Mendbayar (Mendbayar 
) , around the world, is quite a rare cognomen. The last name Mendbayar is characteristic of Mongolia, where it is quite a common surname, Japan, where it is a very rare surname, and Australia. Not in comparison with a country's population, it is the most numerous in Mongolia, Japan, and the United States. Also, Mendbayar is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mendbayar | Mongolia, Netherlands, Japan, United States, Australia |