In Croatia, Šlosar families are predominantly Croats (from Opatija area ), rarely Slovenes (from Slovenia ), and very rarely Italians (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Zagreb.
Prevalence
About 30 people with faimily name Šlosar live in Croatia today, in 16 households. There were 30 of them in the middle of the past century, and their number remains constant. They are located in threee Croatian counties, two cities and 6 other places, mostly in Rijeka (<10), Sapjane in Opatija area (<10), Gornja Bistra in Oroslavje area (<5), Mucici in Opatija area (<5), and in Opatija (<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.