Last name Petousis (Petousis 
) , in the world, is a rare cognomen. The family name Petousis is characteristic of Cyprus, where it is quite a common surname, Greece, where it is quite a rare surname, and Australia, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Greece, Cyprus, and South Africa.
| VARIANT | COUNTRY |
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| Petousis | Greece, Australia, South Africa, Cyprus, United States |
| stamatios petousis researcher |
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| markos petousis researcher |
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| helen petousis-harris New Zealand vaccinologist, NZ |
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| vlasios petousis particle physicist |
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| panayiotis petousis researcher (ORCID 0000-0002-0696-608X) |
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| vasileois petousis researcher |
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Mr, Vasilis, Vlasios, Ioannis, Menelaos, Christos, Dimitris, Georgios, Lewnidas, Thodoris, Nikolaos, Vaggelis, Filippos, Stylianos, Christian, Christina, Katherine, Dionisios, Dimitrios, Theodoros, Nikiforos, Emmanouil, Nikolas, Giwrgos, Giorgos, Giannis, Ms, Lex, Ross, John, Nick, Niki, Ella, Maria, Peter, Janet, Evangelos, Tasos, Ilias, Spyros, Angela, Kostas, Dennis, George, Thalia, Harris, Serafim, Georgia, Nikos, and Efthymios