Cognomen Борис-Костянтин (Борис-Костянтин 
) , around the globe, is an extremely rare family name. Much more frequently, Борис-Костянтин is the forename as well as the last name. Parts of the name also exists independently as a first name Борис, and a first name Костянтин.
| VARIANT | COUNTRY |
|---|---|
| Борис-Костянтин | Ukraine |