Petrin families are Croats and they are mostly from Ludbreg. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Slavonski Brod.
Prevalence
About 100 people with faimily name Petrin live in Croatia today, in 50 households. There were 120 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 10 Croatian counties, in 9 cities and 16 other places, mostly in Zagreb (25), in Mali Bukovec (<10) and Sudovcina (<10) in Ludbreg area, Slavonski Brod (<10), and in Martijanec in Ludbreg area (<10).