Petričko families are Croats and they are mostly from Samobor area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Samobor.
Prevalence
About 60 people with faimily name Petričko live in Croatia today, in 20 households. There were 10 of them in the middle of the past century, and their number multiplied. They are located in four Croatian counties and 6 other places, mostly in Strmec in Samobor area (10), Zagreb (<10), Gudovac (<10), Samobor (<10), and in Rakitje in Samobor area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over fifty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.