In Croatia, Gajin families are generally Croats (from Novi Vinodolski ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Pozega and Slavonski Brod.
Prevalence
About 20 people with faimily name Gajin live in Croatia today, in 9 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located and another small Croatian place , mostly in Zagreb (<10), Rijeka (<10), Sesvete (<5), Pozega (<5), and in Novo Selo (<5).
Outside Croatia
Family name Gajin (including: Gayin , Galygin , Gaiin and Gayien ) is present in 24 countries worldwide.