In Croatia, Gjuka families are Croats (from Sveti Ivan Zelina ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Sveti Ivan Zelina.
Prevalence
Only a few people with faimily name Gjuka live in Croatia today, in four households only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only one small Croatian place, in Blazevdol (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.