Zeljko families are Croats and they are mostly from Herzegovina. In the past century, relatively most of Croatian residents bearing this family name were born in Herzegovina (Siroki Brijeg area) and in Imotski area. In Donji Crnač in Herzegovina every third inhabitant had the family name Zeljko.
Prevalence
About 440 people with faimily name Zeljko live in Croatia today, in 190 households. There were 120 of them in the middle of the past century, and their number more than tripled. They are located in the most of Croatian counties, in 31 cities and 45 other places, mostly in Zagreb (130), Split (70), Sesvete (25), Pozega (25), and in Osijek (20).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.