In Croatia, Simončić families are Croats (from Opatija ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Pula.
Prevalence
About 20 people with faimily name Simončić live in Croatia today, in 9 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in five Croatian cities only: in Zagreb (15), Dobrec (<10), Sisak (<5), Rijeka (<5), and in Supetar on the Island of Brac (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.