Last name Demetlika (Demetlika 
) , worldwide, is a very rare cognomen. The last name Demetlika is habitual in Croatia, where it is a rare surname, and Canada, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Demetlika | Croatia, Canada |
| tulio demetlika Croatian politician, HR (b. 1958) |
|