In Croatia, Arlavi families are generally Croats (from Pregrada area ), barely Montenegrins (from Zagreb ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Pregrada area.
Prevalence
About 50 people with faimily name Arlavi live in Croatia today, in 20 households. There were 50 of them in the middle of the past century, and their number remains constant. They are located and 7 other Croatian places, mostly in Zagreb (20), Osijek (10), Tvrdjavica (<10), Trnovec Desinicki in Pregrada area (<10), and in Branjin Vrh (<5).
Outside Croatia
Family name Arlavi is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1938 in source Phone Book - Zagreb 1938.