Family name Giannakopoulos (Giannakopoulos 
, Γιαννακόπουλος ) , all around the world, is a common last name. The cognomen Giannakopoulos is characteristic of Greece, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Australia, where it is a rare surname. In absolute terms, it is the most numerous in Greece, Germany, and the United States.
| VARIANT | COUNTRY |
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| Giannakopoulos | Greece, United States, Australia, Canada, Germany |
| Γιαννακόπουλος | Greece |
| angelos giannakopoulos DE (b. 1962) |
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| panteilemon giannakopoulos Greek professor of psychiatry |
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| george giannakopoulos researcher (ORCID 0000-0003-2459-589X) |
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| nicolas giannakopoulos private consultant, CH |
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| nadia giannakopoulos researcher |
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| georgios giannakopoulos researcher (ORCID 0000-0002-7081-3643) |
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| fotios giannakopoulos Ph.D. Johannes Gutenberg-Universität Mainz 1989 |
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| georgios giannakopoulos researcher ORCID 0000-0002-1659-3504 |
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| nikolaos nikitas giannakopoulos researcher |
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| panteleimon giannakopoulos researcher |
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| george giannakopoulos researcher (ORCID 0000-0001-7427-1776) |
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| george giannakopoulos researcher (ORCID 0000-0001-9070-1473) |
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| triantafillos g giannakopoulos researcher ORCID ID = 0000-0002-9533-6249 |
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| christos giannakopoulos researcher (ORCID 0000-0003-1822-7716) |
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| aristeidis giannakopoulos researcher (ORCID 0000-0001-9730-5027) |
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