In Croatia, Jačan families are Croats (from Biograd na moru area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zadar and in Biograd na moru area.
Prevalence
About 50 people with faimily name Jačan live in Croatia today, in 20 households. There were 20 of them in the middle of the past century, and their number more than doubled. They are located in only five naselja i to in Turanj in Biograd na moru area (25), Zadar (15), Sveti Filip i Jakov in Biograd na moru area (<10), Zagreb (<5), and in Tenja (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.