In Croatia, Jadrošić families are Croats (from the Island of Losinj ). In the past century, relatively most of Croatian residents bearing this family name were born in Zadar and on the Island of Losinj. In Ilovik on the Island of Losinj every fourth inhabitant had the family name Jadrošić.
Prevalence
About 20 people with faimily name Jadrošić live in Croatia today, in 17 households. There were 50 of them in the middle of the past century, and their number decreased significantly. They are located in only five naselja i to in Zadar (<10), Ilovik in Rijeka area (<10), Rijeka (<10), Premuda (<5), and in Porec (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.