Last name Gmajnički (Gmajnički 
) , worldwide, is a very rare cognomen. The family name Gmajnički is characteristic of Southern Europe, particularly Croatia, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Gmajnički | Croatia |
| zvonimir gmajnički association football player (1906-1983), HR (b. 1906) |
|