Family name Heydarian (Heydarian 
) , across the world, is a rare surname. The last name Heydarian is habitual in Iran, where it is a rare surname, Australia, where it is a very rare surname, and Canada. Measured by absolute frequency, it is commonest in Iran, the United States, and Germany. Much less frequently, Heydarian is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Heydarian | Iran, United States, France, Canada, Germany |
| peyman heydarian researcher (ORCID 0000-0001-8303-1176) |
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| hamid heydarian researcher (ORCID 0000-0002-9824-5828) |
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| richard heydarian Philippine political analyst, PH |
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| deniz heydarian researcher (physiology anatomy & microbiology) |
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| hamidreza heydarian researcher (ORCID 0000-0003-1341-3165) |
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| mohsen heydarian Ph.D. University of Tabriz 2010 |
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| s. heydarian botanist |
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| samira heydarian researcher |
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| arsalan heydarian researcher |
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| nassir heydarian |
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Mr, Majid, Mehdi, Milad, Saleh, Saman, Sahar, Sasan, Saeed, Saeid, Sajad, Susan, Seyed, Arash, Arefe, Arman, Abbas, Abtin, Akbar, Ahmad, Cyrus, Babak, Mahdi, Bruce, Marzi, Hadi, Ms, Al, Ali, Aki, Ava, Roy, Row, Mona, Sara, Sama, Amir, Amin, Roya, Reza, Liya, Jack, June, Todd, Nick, Nima, Neda, Omid, and Keyon