Petolas families are Croats and they are mostly from Zapresic area. In the past century, relatively most of Croatian residents bearing this family name were born in Zapresic area and in Zagreb.
Prevalence
About 70 people with faimily name Petolas live in Croatia today, in 40 households. There were 120 of them in the middle of the past century, and their number decreased by 40 percent. They are located in four Croatian counties, two cities and 7 other places, mostly in Zagreb (40), Jakovlje in Zapresic area (20), Donja Bistra in Oroslavje area (10), Leprovica (<5), and in Jabuceta in Bjelovar area (<5).
Outside Croatia
Family name Petolas is present in four countries on three continents.
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.