Cognomen Διαμαντής (Diamantis 
, Diamandi , Διαμαντής ) , around the world, is a common surname. The family name Διαμαντής is habitual in Greece, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Albania. In absolute terms, it most frequently occurs in Greece, the United States, and Romania. Likewise, Διαμαντής is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Diamantis, Diamandi | Australia, Germany, Romania, Greece, United States |
| Διαμαντής | Greece |
| Diamandis | Australia, Germany, United Kingdom, Greece, United States |
Adam, Adamantios, Adamos, Αδαμάντιος, Адам, אדם, آدم, アダム, 亚当, and 亞當
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διομήδης διαμαντής Greek politician, GR (b. 1843) |
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περικλής διαμαντής Greek person with the ability to remember numbers and perform calculations, GR (b. 1895) |
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| γεώργιος διαμαντής Greek sport shooter, GR (b. 1900) |
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| αδαμάντιος διαμαντής Cypriot painter (1900-1994), CY (b. 1900) |
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| απόστολος διαμαντής Greek economist, GR (b. 1955) |
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| δημήτρης διαμαντής Greek footballer, GR (b. 1979) |
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| χρήστος διαμαντής Greek musician, GR |
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| φειδίας διαμαντής Cypriot mayor, CY |
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| νίκος διαμαντής Greek director, GR |
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| απόστολος διαμαντής Greek footballer, GR |
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