In Croatia, Vilk families are generally Croats (from Slatina ), barely Russians (from Zagreb ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Slatina and Virovitica. In Bakić in Slatina every thirtieth inhabitant had the family name Vilk.
Prevalence
About 50 people with faimily name Vilk live in Croatia today, in 17 households. There were 40 of them in the middle of the past century, and their number increased by 20 percent. They are located in 6 Croatian counties, in 6 cities and 5 other places, mostly in Slatina (35), Velika Gorica (<10), Zagreb (<5), Osijek (<5), and in Bakic (<5).