Cognomen Athanasiou (Athanasiou 
, Αθανασίου , Атанасиу 
) , worldwide, is a common family name. The last name Athanasiou is characteristic of Cyprus, where it is a common surname, Greece, and Australia, where it is a rare surname. Measured by absolute frequency, it is commonest in Greece, Cyprus, and the United States. Much less frequently, Athanasiou is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Athanasiou | Australia, Greece, Germany, United States, Cyprus |
| Αθανασίου | Greece |
| Атанасиу | Russia, Bulgaria |
| georgios athanasiou RO (b. 1802) |
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| génica athanasiou French actress (1897-1966), FR (b. 1897) |
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tasia athanasiou Greek diplomat, GR |
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andreas athanasiou Canadian ice hockey player, CA (b. 1994) |
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| kyriacos a. athanasiou American bioengineer (b. 1960) |
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| nadja athanasiou CH (b. 1952) |
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| modestos athanasiou researcher |
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| christiana athanasiou Ph.D. Massachusetts Institute of Technology 2011 |
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| alexandra athanasiou researcher |
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| athanasios e athanasiou researcher (ORCID 0000-0002-8557-4833) |
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| christina athanasiou researcher ORCID ID = 0000-0003-2973-3550 |
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| stavros athanasiou researcher |
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| antonios athanasiou researcher ORCID 0000-0002-9442-3703 |
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| kyriacos athanasiou researcher |
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| nicholas athanasiou researcher (ORCID 0000-0001-6233-5728) |
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