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 | Bulgaria, Russia, Kazakhstan, Ukraine, Belarus |
| Konstantinow | Brazil, Poland, United States, Estonia, Germany |
| Konstantinov | Moldova, Bulgaria, Serbia, Russia, Uzbekistan |
| Constantinov | Moldova, Brazil, Bulgaria, Russia, Romania |