Cognomen Papaioannou (Papaioannou 
, Παπαϊωάννου , Папаиоанну 
) , in all the world, is a common last name. The last name Papaioannou is habitual in Greece, where it is a common surname, Cyprus, and Serbia, where it is quite a rare surname. In absolute terms, it most frequently occurs in Greece, Cyprus, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Papaioannou | Serbia, Greece, Cyprus, United States, Germany |
| Παπαϊωάννου | Greece |
| Папаиоанну | Russia |
| athanasios papaioannou Greek priest, GR (b. 1850) |
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| johannes c. papaioannou botanist (1904-1957), GR (b. 1904) |
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| dina papaioannou Greek singer (b. 1966) |
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| sofia papaioannou Greek journalist (b. 1969) |
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| theo papaioannou researcher ORCID ID = 0000-0001-5228-4242 (b. 1970) |
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| evangelos th. papaioannou researcher ORCID ID = 0000-0002-9822-2343 |
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| elias papaioannou economist (London Business School (LBS); National Bureau of Economic Research (NBER); Centre for Economic Policy Research (CEPR)) |
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| anastasios papaioannou researcher ORCID ID = 0000-0002-8959-4559 |
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| andriana i papaioannou researcher ORCID ID = 0000-0001-9708-3241 |
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| christos papaioannou researcher |
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| konstantinos g papaioannou researcher |
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| alexandra papaioannou researcher (ORCID 0000-0002-3470-284X) |
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| maria papaioannou researcher (ORCID 0000-0002-1999-9622) |
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| charikleia papaioannou researcher |
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| evi papaioannou Ph.D. University of Patras 2004 |
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