Cognomen Karagiannis (Karagiannis 
, Καραγιάννης ) , worldwide, is a common family name. The surname Karagiannis is characteristic of Greece, where it is a common surname, Jersey, where it is quite a common surname, and Cyprus. In absolute terms, this name is the most popular in Greece, Cyprus, and the United States.
| VARIANT | COUNTRY |
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| Karagiannis | Greece, Australia, Germany, United States, Cyprus |
| Καραγιάννης | Greece |
Karayannis, and Карагианнис
| dimitris karagiannis Austrian computer scientist, AT (b. 1956) |
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| vasileios karagiannis (b. 1948) |
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| athanasios karagiannis chess player (b. 1964) |
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| emmanuel karagiannis Belgian association football player, BE (b. 1966) |
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| george s karagiannis researcher |
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| dimitris karagiannis Dr.-Ing. Technische Universität Berlin 1987 |
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| george karagiannis researcher |
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| emmanuel karagiannis researcher |
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| menios karagiannis director and filmmaker |
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| stefanos e karagiannis researcher |
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| konstantinos karagiannis researcher |
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| vassilis karagiannis researcher |
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| georgios karagiannis computer science researcher |
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| tanya t karagiannis researcher |
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| anastassios karagiannis researcher |
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