Valenčić families are Croats and they are mostly from Opatija area. In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and in Opatija area. In Smišljak in Vrbovsko every second inhabitant had the family name Valenčić.
Prevalence
About 260 people with faimily name Valenčić live in Croatia today, in 130 households. There were 270 of them in the middle of the past century, and their number remains constant. They are located in the most of Croatian counties, in 19 cities and 26 other places, mostly in Rijeka (95), Klana in Opatija area (30), Zagreb (15), Lisac in Opatija area (15), and in Viskovo in Rijeka area (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1729 in source Catholic Church Parish Records.