Last name Athanassiou (Athanassiou 
) , throughout the world, is a rare cognomen. The family name Athanassiou is characteristic of Greece, where it is quite a rare surname, Cyprus, and Lebanon, where it is a rare surname. In absolute terms, the name is most common in Greece, Germany, and Australia.
| VARIANT | COUNTRY |
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| Athanassiou | Greece, Australia, Germany, France, Lebanon |
| georg athanassiou (b. 1911) |
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| labros athanassiou researcher |
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| christos g athanassiou researcher |
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| athanassia athanassiou researcher |
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| christos g. athanassiou Greek entomologist, GR |
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| dino athanassiou |
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| athanassios athanassiou |
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Mr, John, Joao, Jean, Theo, Nick, Eddy, Evan, Olga, Yani, Maria, Megan, Mcips, Sarah, Sofia, Andre, Costa, Cindy, Katia, Kerry, Jana, Lucy, Liza, Glen, Ms, Mar, Ada, Kim, Lia, Jim, Eva, Ion, Mary, Paula, Mike, Ange, Anna, Aris, Brad, Bill, Katy, Pari, Paul, Dino, Alex, and Peter