Surname Zadorozhnii (Задорожный 
, Задорожний 
, Zadorozhnii 
) , around the world, is a common cognomen. The last name Zadorozhnii is habitual in Ukraine, where it is quite a common surname, Kazakhstan, where it is quite a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Задорожный | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Задорожний | Kazakhstan, Russia, Belarus, United States, Ukraine |
| Zadorozhnii | Russia, Spain, Georgia, Poland, Ukraine |
| Задорожнии | Russia |
Задорожнйй, and Задорожній
| vladimir grigorievich zadorozhnii Ph.D. Voronezh State University 1970 |
|