In Croatia, Sutnjak families are Croats (from Cakovec area ). In the past century, relatively most of Croatian residents bearing this family name were born in Cakovec and Bjelovar.
Prevalence
About 30 people with faimily name Sutnjak live in Croatia today, in 13 households. There were 40 of them in the middle of the past century, and their number decreased by 40 percent. They are located in four Croatian counties, four cities and 6 other places, mostly in Nedelisce in Cakovec area (<10), Bjelovar (<5), Zagreb (<5), Lopatinec in Cakovec area (<5), and in Cakovec (<5).
Outside Croatia
Family name Sutnjak is present in this form only in Croatia.