Očko families are Croats and they are mostly from Pregrada area. According to some sources they are from Vrbisnica near Hum na Sutli. In the past century, relatively most of Croatian residents bearing this family name were born in Slovenia and in Zagreb. In places Vrbišnica and Hum na Sutli in Pregrada area every ninth inhabitant had the family name Očko.
Prevalence
About 210 people with faimily name Očko live in Croatia today, in 80 households. There were 220 of them in the middle of the past century, and their number remains constant. They are located in 7 Croatian counties, in 11 cities and 15 other places, mostly in Vrbisnica in Pregrada area (65), Zagreb (65), in Hum na Sutli (25) and Lastine (<10) in Pregrada area, and in Donja Stubica (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.