Surname Κωστής (Kostis 
, Costis 
, Κωστής ) , in the entire world, is quite a rare family name. The last name Κωστής is characteristic of Greece, where it is quite a common surname, Cyprus, where it is quite a rare surname, and North Macedonia, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Greece, the United States, and Romania. Likewise, Κωστής is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kostis | Greece, Canada, France, United States, Cyprus |
| Costis | Greece, Romania, France, United States, Cyprus |
| Κωστής | Greece |
Constantios, Costakis, Costantinos, Costas, Cottas, Dinos, Konstantinos, Konstantios, Konstantis, Konstantínos, Kostakis, Kostas, Kostes, Kosztasz, Kottas, Kóstas, Ntinos, Takis, Κωνσταντής, Κωνσταντίνος, Κωστάκης, Κώστας, Ντίνος, Τάκης, Константий, Константинос, Константінос, Констанций, Костас, קונסטנטין, قسطنطين, and كوستاس
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νικόλαος κωστής Greek university professor, GR (b. 1805) |
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| κωνσταντίνος ν. κωστής (b. 1833) |
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| αντώνης κωστής Greek songwriter, singer, GR (b. 1905) |
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| δημήτριος κωστής Greek politician (1910-1969), GR (b. 1910) |
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| γιάννης κωστής Greek actor ( 1933-2020), GR (b. 1933) |
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| τάσος κωστής Greek actor, GR (b. 1951) |
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| κώστας κωστής GR (b. 1957) |
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| χρίστος κωστής Greek footballer, GR (b. 1972) |
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Βλαχόπουλος, Κρητικός, Ζαφειρίου, Θεοδώρου, Κοκκινίδης, Παπανδρέου, and Παπαδάκης