Surname Dadyka (Дадыка 
, Dadyka 
) , in all the world, is a rare cognomen. The surname Dadyka is characteristic of Russia, where it is a rare surname, Ukraine, where it is a very rare surname, and Germany, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Дадыка | Russia, Ukraine |
| Dadyka | United States, Germany, Russia, Ukraine |