In Croatia, Bolterštain families are Croats (from Buzet ). In the past century, relatively most of Croatian residents bearing this family name were born in Slovenia.
Prevalence
Only a few people with faimily name Bolterštain live in Croatia today, in one household only. They are located in only two Croatian places: in Stanica Roc (<5) and Roc (<5).
Outside Croatia
Family name Bolterštain is present in this form only in Croatia.
