In Croatia, Smijulj families are mainly Croats (from Tuzla Region (Bosnia) ), equally Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Beli Manastir area and in Tuzla Region, Bosnia (Tuzla area).
Prevalence
About 20 people with faimily name Smijulj live in Croatia today, in 10 households. There were 50 of them in the middle of the past century, and their number decreased significantly. They are located in four Croatian counties, threee cities and four other places, mostly in Rijeka (<10), Beli Manastir (<10), Zagreb (<5), and in Dvor (<5) and Rujevac (<5) in Hrvatska Kostajnica area.