Last name Delfani (Delfani 
) , in all the world, is a rare surname. The cognomen Delfani is habitual in Iran, where it is a rare surname, Netherlands, where it is a very rare surname, and Indonesia. Measured by absolute frequency, the name is most common in Iran, Indonesia, and the United States. Also, Delfani is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Delfani | Indonesia, Iran, United States, Canada, Democratic Republic of the Congo |
| somayeh delfani researcher (ORCID 0000-0002-2335-5782) |
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| mahtab delfani Ph.D. Urmia University 2017 |
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| payam delfani researcher oncology |
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| somayeh delfani researcher (ORCID 0000-0001-6707-8070) |
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