Surname Kyryljuk (Kyryljuk 
, Кырылюк 
) , around the world, is a very rare cognomen. The last name Kyryljuk is habitual in Estonia, where it is a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kyryljuk | Estonia |
| Кырылюк | Russia |