Surname Demianyk (Demianyk 
) , in the entire world, is a very rare cognomen. The family name Demianyk is characteristic of Canada, where it is a very rare surname, the United Kingdom, and France, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in the United Kingdom, Canada, and the United States. Much less frequently, Demianyk is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Demianyk | Canada, United Kingdom, France, United States, Spain |