Surname Διαμαντόπουλος (Diamantopoulos 
, Diamandopol 
, Διαμαντόπουλος ) , across the world, is quite a common cognomen. The family name Διαμαντόπουλος is habitual in Greece, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Australia, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Greece, the United States, and Australia.
| VARIANT | COUNTRY |
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| Diamantopoulos | Australia, United States, Germany, Greece, Canada |
| Diamandopol | United States, Romania |
| Διαμαντόπουλος | Greece |
| Diamandopoulos | Australia, United States, United Kingdom, Greece, Canada |
| κωνσταντίνος διαμαντόπουλος GR (b. 1800) |
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| γεώργιος διαμαντόπουλος GR (b. 1800) |
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| αδαμάντιος διαμαντόπουλος Greek politician (1826-1876), GR (b. 1826) |
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τάκης διαμαντόπουλος Greek photographer, GR (b. 1949) |
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| ιάκωβος διαμαντόπουλος Greek politician and physician, GR (b. 1905) |
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| βασίλης διαμαντόπουλος GR (b. 1902) |
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| διαμαντής διαμαντόπουλος Greek painter (1914-1995), GR (b. 1914) |
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| βασίλης διαμαντόπουλος Greek actor (1920-1999), GR (b. 1920) |
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| γρηγόρης διαμαντόπουλος greek architect, GR (b. 1923) |
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| πέτρος διαμαντόπουλος American university administrator, GR (b. 1928) |
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| κώστας διαμαντόπουλος Greek association football player, GR (b. 1938) |
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| κώστας διαμαντόπουλος Greek basketball player, GR (b. 1946) |
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| σταύρος διαμαντόπουλος footballer and football manager, GR (b. 1947) |
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| λάμπρος διαμαντόπουλος Greek marble sculptor, 1955 -, GR (b. 1955) |
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| αδαμάντιος διαμαντόπουλος Greek economist, GR (b. 1958) |
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Χρήστος, Κώστας, Διονύσης, Δημήτρης, Επαμεινώνδας, Μιχάλης, Γιώργος, Βασίλης, Αναστάσιος, Σταύρος, Γιάννης, Στέφανος, Κωνσταντίνος, and Παναγιώτης