In Croatia, Lajčak families are predominantly Croats (from Belisce area ), rarely Slovaks (from Nasice ). In the past century, relatively most of Croatian residents bearing this family name were born in Nasice and in Belisce area.
Prevalence
About 30 people with faimily name Lajčak live in Croatia today, in 13 households. There were 10 of them in the middle of the past century, and their number tripled. They are located in threee Croatian counties and threee other places, mostly in Marijanci in Belisce area (15), Breznica Nasicka in Nasice area (<10), Nasice (<5), Podgajci Podravski (<5), and in Rijeka (<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.