Last name Kanstantin (Канстантин 
, Kanstantin 
) , around the world, is a very rare cognomen. The last name Kanstantin is habitual in Armenia, where it is a rare surname, Greece, where it is a very rare surname, and Kyrgyzstan. More prevalently, Kanstantin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Канстантин | Kyrgyzstan, Kazakhstan, Armenia, Russia |
| Kanstantin | Russia, Belarus, United States, India, Greece |
C-Tin, Constantin, Constantine, Constantino, Kanstancin, Kanstantsin, Konstantin, Konstantinas, Konstantín, Kostyantyn, Канстанцін, Константин, Константино, Костен, Костя, Костянтин, קונסטנטין, قسطنطين, كونستانتين, and კონსტანტინე
Dzik, Badunov, Kaparykha, Labokha, Khmialnitski, Kuznetsov, and Kachanouski