In Croatia, Petrus families are Croats (from Novi Marof area ). In the past century, relatively most of Croatian residents bearing this family name were born in Novi Marof area and in Novi Marof.
Prevalence
About 40 people with faimily name Petrus live in Croatia today, in 12 households. There were 60 of them in the middle of the past century, and their number decreased by 30 percent. They are located in four Croatian counties, four cities and threee other places, mostly in Breznicki Hum in Novi Marof area (15), Zagreb (<10), Zadar (<10), Borenec in Novi Marof area (<10), and in Varazdin (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.