Cognomen دایکا (Dayka 
, Dajka 
, دایکا) , throughout the world, is quite a rare last name. The last name دایکا is characteristic of Eastern Europe, particularly Hungary, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Poland, where it is a rare surname. Measured by absolute frequency, it is commonest in Hungary, Poland, and the United States. Also, دایکا is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dayka | Panama, Canada, United States, Iraq, Romania |
| Dajka | Slovakia, Poland, Hungary, United States, Romania |