In Croatia, Knajz families are almost entirely Croats (from Vinkovci area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and in Vinkovci area.
Prevalence
About 20 people with faimily name Knajz live in Croatia today, in 10 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in two Croatian counties, two cities and 5 other places, mostly in Ivanovac (<10) and Ernestinovo (<10) in Osijek area, Osijek (<5), Laslovo in Osijek area (<5), and in Split (<5).
Outside Croatia
Family name Knajz is present in three countries on two continents. "Knaiz " is used by few people in the United States.