In Croatia, Kertis families are Croats (from Kutina area ). In the past century, relatively most of Croatian residents bearing this family name were born in Kutina area and in Kutina.
Prevalence
About 20 people with faimily name Kertis live in Croatia today, in 8 households. There were 30 of them in the middle of the past century, and their number decreased by 30 percent. They are located in four Croatian counties, two cities and 8 other places, mostly in Osekovo in Kutina area (<10), Vukovar (<10), Struzec in Kutina area (<5), Osijek (<5), and in Popovaca in Kutina area (<5).