Cognomen Onofrej (Onofrej 
) , globally, is a rare surname. The last name Onofrej is characteristic of Slovakia, where it is quite a rare surname, Hungary, where it is a rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Onofrej | Slovakia, United States, Hungary, United Kingdom, Croatia |
| ladislav onofrej Slovak footballer, SK (b. 1977) |
|