In Croatia, Kaplan families are Croats (from Osijek ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and Makarska.
Prevalence
About 60 people with faimily name Kaplan live in Croatia today, in 30 households. There were 40 of them in the middle of the past century, and their number increased by 50 percent. They are located in 8 Croatian counties and 6 other places, mostly in Zagreb (20), Osijek (10), Nova Gradiska (<5), Cepin in Osijek area (<5), and in Tenja (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.