In Croatia, Valkaj families are Croats (from Cazma ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Cakovec.
Prevalence
About 40 people with faimily name Valkaj live in Croatia today, in 18 households. There were 30 of them in the middle of the past century, and their number increased by 70 percent. They are located in 6 Croatian counties, in 6 cities and four other places, mostly in Zagreb (10), Cazma (<10), Zelezna Gora in Mursko Sredisce area (<10), Cakovec (<5), and in Zadar (<5).