Globally, Костас (Konstantinos 
, Kostas 
, Costas , along with others...) is a widespread boy's first name. The given name Костас is habitual in Greece, where it is a prevalent masculine name, Cyprus, where it is a common male name, and Lithuania, where it is quite a common masculine name. In absolute terms, the name is most common in Greece, Germany, and Cyprus. Likewise, Костас is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Konstantinos | Germany, Greece, Spain, Cyprus, United States |
| Kostas, Costas | Germany, Greece, Spain, Cyprus, Argentina |
| Костас | Bulgaria, Kazakhstan, Belarus, Russia, Lithuania |
| Costis | Greece, Cyprus, Philippines, United States, Romania |
Constantine, Constantino, Constantinus, Constantios, Costakis, Costantinos, Cottas, Dinos, Konstantios, Konstantis, Konstantínos, Kostakis, Kostis, Kosts, Kosztasz, Kottas, Ntinos, Takis, Κωνσταντής, Κωνσταντίνος, Κωστάκης, Κωστής, Κώστας, Ντίνος, Τάκης, Константий, Константин, Константино, Константинос, Константінос, Констанций, קונסטנטין, قسطنطين, and كوستاس
Костас is also a name for the fictitious and mythical characters: Kostas Charitos , the fictional cop character of writer Petros Markaris; Kostis Dimoulias , the theatrical character in the play "Steering wheel in the love", Love's steering wheel; Kostas , the character in the play "Laurels and Oleanders"; Kostas , the theatrical character in the play "Horiste ti gynaika sas" and Kostas , the theatrical character in the play "Seventh Day of Creation", among other works.
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кубилинскас, костас Lithuanian writer, LT (b. 1923) |
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| корсакас, костас LT (b. 1909) |
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| гликас, костас якубович LT (b. 1926) |
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| сморигинас, костас Lithuanian theatre and cinema actor and musician, LT (b. 1953) |
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| костас исакидис Bulgarian association football player (1955-), BG (b. 1955) |
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