Around the globe, Riehan (Riehan 
) is a very rare principally male, but scarcely female first name. The forename Riehan is characteristic of South-eastern Asia, particularly Indonesia, where it is a very rare male name. Much less frequently, Riehan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Riehan | Philippines, India, Indonesia, China, South Africa |