Bertol families are Croats and they are mostly from Oroslavje. According to some sources hey originate from Italy. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Oroslavje. In Krušljevo Selo in Oroslavje every seventh inhabitant had the family name Bertol.
About 160 people with faimily name Bertol live in Croatia today, in 60 households. There were 120 of them in the middle of the past century, and their number increased by 30 percent. They are located in 7 Croatian counties, in 10 cities and 7 other places, mostly in Zagreb (65), Krusljevo Selo (40), Velika Mlaka (15), Samobor (<10), and in Jakovlje in Zapresic area (<10).