Throughout the world, Diadiuk (Diadiuk 
, Дядюк 
) is an extremely rare unknown gender first name. Much more frequently, Diadiuk is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Diadiuk | Poland, Argentina, Mexico, United States, Ukraine |
| Дядюк | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |