Otmačić families are Croats and they are mostly from Samobor. In the past century, relatively most of Croatian residents bearing this family name were born in Samobor and in Slovenia.
Prevalence
About 90 people with faimily name Otmačić live in Croatia today, in 30 households. There were 70 of them in the middle of the past century, and their number increased by 20 percent. They are located in threee Croatian counties, four cities and four other places, mostly in Samobor (40), Mala Jazbina (35), Pula (<10), Bregana (<5), and in Samoborski Otok (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.