Around the globe, Keyhan (كيهان 
, Keyhan 
, کیهان 
) is a rare boy's given name. The forename Keyhan is characteristic of Afghanistan, where it is a rare boy's name, Iran, and Bulgaria. Not in comparison with a country's population, this name is the most popular in Afghanistan, Iran, and the United States. Very seldom, Keyhan is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| كيهان | Iran, Iraq |
| Keyhan | Canada, Israel, Austria, United States, Iran |
| کیهان | Afghanistan, Turkey, Iran |
| Кейхан | Belarus, Russia |
| keyhan mohammadi researcher (ORCID 0000-0002-7699-8538) |
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| keyhan shahsavari researcher (ORCID 0000-0003-1805-3998) |
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| keyhan ashrafi researcher ORCID ID = 0000-0002-1742-1245 |
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