Last name ممتحن (ممتحن 
) , in all the world, is a rare cognomen. The surname ممتحن is characteristic of Southern Asia, particularly Iran, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| ممتحن | Iran |
|
نصرت الله ممتحن Iranian sports shooter, IR (b. 1930) |
|