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Family name Kostantin (Костантин
, Kostantin
) , throughout the world, is a rare cognomen. The family name Kostantin is habitual in North Macedonia, where it is quite a rare surname, Greece, and Armenia. Not in comparison with a country's population, it most frequently occurs in Greece, North Macedonia, and Egypt. More frequently, Kostantin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Костантин | Kazakhstan, Russia, Poland, Bulgaria, Ukraine |
| Kostantin | Tanzania, Greece, Bulgaria, Reunion, North Macedonia |