Surname Dejak (Dejak 
, Деяк 
) , in the entire world, is quite a rare family name. The cognomen Dejak is habitual in Slovenia, where it is quite a rare surname, Ukraine, and Croatia. Measured by absolute frequency, it is commonest in Ukraine, Slovenia, and Russia. Much less frequently, Dejak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dejak | Croatia, India, United States, Slovenia, Poland |
| Деяк | Ukraine, Russia, Belarus, Kazakhstan |
| henrik dejak SI (b. 1840) |
|
|
| camillo dejak author (20th century) (b. 1901) |
|
|
| france dejak Survivor of the Kocevski Rog killings, SI (b. 1925) |
|
|
| michal dejak UA (b. 1922) |
|
|
|
ernesta dejak furlan SI |
|
| beata dejak researcher, PL (b. 1964) |
|
|
| lijana dejak SI (b. 1960) |
|
|
| janez dejak SI (b. 1973) |
|
|
| michael dejak |
|
|
| vlasta dejak SI |
|
|
| adèle dejak GB |
|