Sironić families are Croats and they are mostly from Pazin. In the past century, relatively most of Croatian residents bearing this family name were born in Pula and Rijeka.
Prevalence
About 70 people with faimily name Sironić live in Croatia today, in 40 households. There were 100 of them in the middle of the past century, and their number decreased by 30 percent. They are located in four Croatian counties, in 7 cities and 6 other places, mostly in Zagreb (<10), Medulin in Pula area (<10), Pula (<10), Rijeka (<10), and in Pazin (<10).
Outside Croatia
Family name Sironić (including: Sironic , Sironich ) is present in 9 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1691 in source Catholic Church Parish Records.