In Croatia, Kastelić families are predominantly Croats (from Rijeka area ), rarely Italians (from Rijeka area ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Zagreb.
Prevalence
About 10 people with faimily name Kastelić live in Croatia today, in 8 households. There were 40 of them in the middle of the past century, and their number decreased significantly. They are located in only five naselja i to in Zagreb (<10), Rijeka (<10), in Viskovo (<5) and Buzdohanj (<5) in Rijeka area, and in Krasica (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1923 in source Emigration Commission Zagreb.