In Croatia, Crneka families are Croats (from Varazdin ).
Prevalence
Only a few people with faimily name Crneka live in Croatia today, in two households only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Zagreb (<5) and Varazdin (<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.