In Croatia, Desetnik families are Croats (from Karlovac ).
Prevalence
Only a few people with faimily name Desetnik live in Croatia today, in one household only. There were 0 of them in the middle of the past century, and their number multiplied. They are located in only one small Croatian place, in Kobilic Pokupski (<10).
Outside Croatia
Family name Desetnik is present in this form only in Croatia.