Across the world, Диах (Diah 
, Диах) is a widespread principally girly, but very seldom masculine first name. The forename Диах is habitual in Indonesia, where it is quite a common principally feminine, but very infrequently masculine name, Brunei, where it is quite a rare girly name, and Taiwan. Measured by absolute frequency, the name is most common in Indonesia, Taiwan, and Saudi Arabia. Very seldom, Диах is the last name as well as the forename.