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 | Ukraine, Argentina, United States, Mexico, Poland |
| Дядюк | Ukraine, Kazakhstan, Russia, Belarus, Kyrgyzstan |