In Croatia, Boos families are almost entirely Croats (from Lepoglava area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Lepoglava area and in Virovitica. In Benkovec in Lepoglava area every fiftieth inhabitant had the family name Boos.
Prevalence
About 20 people with faimily name Boos live in Croatia today, in 8 households. They are located in only five naselja i to in Benkovec in Lepoglava area (<10), Virovitica (<10), Lepoglava (<5), Gospic (<5), and in Grabovac in Slunj area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1927 in source Emigration Commission Zagreb.