In Croatia, Rundek families are Croats (from Zlatar area ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Vrbovec area.
Prevalence
About 60 people with faimily name Rundek live in Croatia today, in 30 households. There were 120 of them in the middle of the past century, and their number halved. They are only located in four Croatian cities and 10 other places, mostly in Zagreb (20), Bocaki in Zlatar area (15), Domagovic (<10), Gorica Svetojanska (<10), and in Gaj (<5).
Outside Croatia
Family name Rundek is present in 7 countries on four continents. The family name "Rundek " is used by small number of people in the United States and small number in France.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.