Plazonić families are Croats and they are mostly from Vrlika. In the past century, relatively most of Croatian residents bearing this family name were born in Vrlika and Split. In Divojevići in Kastela area every eighth inhabitant had the family name Plazonić.
Prevalence
About 390 people with faimily name Plazonić live in Croatia today, in 160 households. There were 160 of them in the middle of the past century, and their number more than doubled. They are located in the most of Croatian counties, in 26 cities and 31 other places, mostly in Split (100), Kastel Stari (50), Zagreb (40), Vinalic (35), and in Jezevic (20).
Outside Croatia
Family name Plazonić is present in 9 countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.