In Croatia, Bertečić families are Croats (from Sveti Ivan Zelina area ). In the past century, relatively most of Croatian residents bearing this family name were born in Sveti Ivan Zelina area and in Zagreb. In Dropčevec in Sveti Ivan Zelina area every second inhabitant had the family name Bertečić.
Prevalence
About 40 people with faimily name Bertečić live in Croatia today, in 14 households. There were 50 of them in the middle of the past century, and their number decreased by 20 percent. They are located in only five Croatian places: in Zagreb (15), in Dropcevec (<10) and Hruskovec (<10) in Sveti Ivan Zelina area, Celine (<5), and in Samoborec (<5).
Outside Croatia
Family name Bertečić is present in this form only in Croatia.
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.