In Croatia, Karlak families are generally Croats (from Nasice ), very rarely Slovaks (also from Nasice ). In the past century, relatively most of Croatian residents bearing this family name were born in Nasice and Osijek.
Prevalence
About 20 people with faimily name Karlak live in Croatia today, in 9 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in only four naselja i to in Osijek (15), Nasice (<5), Zagreb (<5), and in Markovac Nasicki (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.