In Croatia, Sirola families are predominantly Croats (from Rijeka area ), rarely Roms (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
About 20 people with faimily name Sirola live in Croatia today, in three households only. There were 100 of them in the middle of the past century, and their number decreased significantly. They are located in only two Croatian places: in Rijeka (<10) and Zastenice in Rijeka area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over forty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.