Cognomen Joannou (Joannou 
, Ιωάννου 
) , worldwide, is quite a rare last name. The family name Joannou is habitual in Cyprus, where it is quite a common surname, Greece, where it is quite a rare surname, and the United Kingdom, where it is a rare surname. Much less frequently, Joannou is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Joannou | Australia, South Africa, United Kingdom, United States, Cyprus |
| Ιωάννου | Greece |
Ioannou, Ioannou, Joannou, and Иоанну
| périclès-pierre joannou born 1904; died 1972, DE (b. 1904) |
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chris joannou Australian Macedonian Musician, AU (b. 1979) |
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| johnny joannou American politician in Virginia (1940-2016), US (b. 1940) |
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| antonella joannou Swiss equestrian (b. 1967) |
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| demetrios joannou researcher |
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| matthew v joannou researcher |
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| joannou kalergi - Apr 1863 |
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| john g. joannou |
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