In Croatia, Kolednjak families are Croats (from Varazdin area ). In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and in Lepoglava area.
Prevalence
About 40 people with faimily name Kolednjak live in Croatia today, in 12 households. There were 30 of them in the middle of the past century, and their number increased by 20 percent. They are located in four Croatian counties, threee cities and four other places, mostly in Varazdin (10), Sracinec in Varazdin area (10), Veternica in Lepoglava area (<10), Zapresic (<5), and in Turcin in Varazdin area (<5).
Outside Croatia
Family name Kolednjak is present in this form only in Croatia.
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.