Jambrušić families are Croats and they are mostly from Bjelovar area. In the past century, relatively most of Croatian residents bearing this family name were born in Bjelovar area and in Bjelovar.
Prevalence
About 150 people with faimily name Jambrušić live in Croatia today, in 70 households. They are located in 8 Croatian counties, in 14 cities and 25 other places, mostly in Krizic in Bjelovar area (20), Bjelovar (20), Donji Maslarac in Koprivnica area (15), Ruskovac in Cazma area (15), and in Zagreb (10).
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.