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