Plasaj families are Croats and they are mostly from Ozalj. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Ozalj. In Gorniki Vivodinski in Ozalj every third inhabitant had the family name Plasaj.
Prevalence
About 70 people with faimily name Plasaj live in Croatia today, in 30 households. There were 110 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 7 Croatian counties, in 6 cities and 9 other places, mostly in Zagreb (15), Ozalj (10), Soldatici (<10), Karlovac (<10), and in Gorniki Vivodinski (<10).
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.