Želježnjak families are Croats and they are mostly from Ozalj area. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and in Ozalj area. In Veselići in Ozalj area every eighth inhabitant had the family name Želježnjak.
Prevalence
About 80 people with faimily name Želježnjak live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 60 percent. They are located in 9 Croatian counties, in 10 cities and 13 other places, mostly in Karlovac (20), Bartolovec in Varazdin area (<10), Samobor (<10), and in Brihovo (<10) and Grice (<10) in Ozalj area.
Outside Croatia
Family name Želježnjak 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.