Cognomen Κωστάκη (Κωστάκη 
) , across the world, is an extremely rare last name. The family name Κωστάκη is habitual in Southern Europe, particularly Greece, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Κωστάκη | Greece |
| αλεξάνδρα κωστάκη Greek kindergarden teacher, writter and poet, GR (b. 1962) |
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| αναστασία κωστάκη basketball player, GR (b. 1978) |
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| παρασκευή κωστάκη 1765, GR |
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