Surname Tamaddon (Tamaddon 
) , globally, is a rare cognomen. The cognomen Tamaddon is habitual in Ireland, where it is a rare surname, Iran, and Sweden. In absolute terms, it is commonest in Iran, the United States, and Ireland. Much less frequently, Tamaddon is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Tamaddon | Canada, Iran, Sweden, Ireland, United States |
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hayley tamaddon British actress and dancer, GB (b. 1977) |
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| gholamhossein tamaddon researcher (ORCID 0000-0001-8158-6004) |
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| fatemeh tamaddon researcher (ORCID 0000-0003-1098-4931) |
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| lana tamaddon researcher |
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| maryam tamaddon researcher |
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Sam, Sheri, Sonya, Aaron, Cyrus, Babak, Betty, Paria, Layla, Taghi, Nader, Negin, Hamid, Farid, Farah, Fedra, Yasie, Yalda, Maryam, Madjgan, Mohsen, Mojgan, Shadi, Shane, Saeid, Saied, Ali, Bob, Ray, Dar, Naz, Mina, Sama, Sina, Sima, Alex, Saghar, Amir, Amid, Kirk, Reza, Dara, Tina, Nima, Foad, Ines, Majid, Milad, Amin, and Soraya