Birin families are Croats and they are mostly from Vodice. In the past century, relatively most of Croatian residents bearing this family name were born in Vodice and Sibenik.
Prevalence
About 120 people with faimily name Birin live in Croatia today, in 50 households. There were 60 of them in the middle of the past century, and their number doubled. They are located in 7 Croatian counties, in 9 cities and two other places, mostly in Vodice (75), Zagreb (25), Zadar (<10), Samobor (<5), and in Rijeka (<5).
Outside Croatia
Family name Birin (including: Birien , Byrin and Birrien ) is present in 19 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.