Throughout the world, Константинов (Константинов 
, Konstantinow 
, Konstantinov 
) is a very rare masculine first name. The first name Константинов is characteristic of Bulgaria, where it is a rare boy's name, Russia, where it is a very rare male name, and China, where it is an extremely rare male name. Much more prevalently, Константинов is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Константинов | Kazakhstan, Russia, Belarus, Bulgaria, Ukraine |
| Konstantinow | Germany, Estonia, United States, Poland, Brazil |
| Konstantinov | Uzbekistan, Russia, Serbia, Moldova, Bulgaria |
| Constantinov | Romania, Russia, Moldova, Bulgaria, Brazil |