In Croatia, Perlain families are almost entirely Croats (from Split ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Split and Omis.
Prevalence
About 50 people with faimily name Perlain live in Croatia today, in 30 households. There were 60 of them in the middle of the past century, and their number decreased by 20 percent. They are located in threee Croatian counties, four cities and threee other places, mostly in Split (45), Dugi Rat in Omis area (<10), Podstrana in Solin area (<5), Omis (<5), and in Donji Dolac (<5).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Perlain is present in five countries on four continents. The family name "Perlain " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1938 in source Emigration Commission Zagreb.