In Croatia, Ružek families are Croats (from Vinkovci area ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Donja Stubica and Zagreb.
Prevalence
About 70 people with faimily name Ružek live in Croatia today, in 30 households. There were 50 of them in the middle of the past century, and their number increased by 30 percent. They are located in 6 Croatian counties, in 8 cities and 6 other places, mostly in Ivanic-Grad (15), Orolik in Vinkovci area (15), Vinkovci (10), Vukovar (<10), and in Cerna in Zupanja area (<5).