In Croatia, Kerže families are Croats (from Osijek ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek.
Prevalence
Only a few people with faimily name Kerže live in Croatia today, in four households only. There were 20 of them in the middle of the past century, and their number halved. They are located in two Croatian cities only, in Osijek (<10) and Zagreb (<5).
Outside Croatia
Family name Kerže (including: Kerze , Kerzee ) is present in 7 countries on three continents. The family name "Kerze " is used by some 100 people in the United States and small number in Ukraine. "Kerzee " is used by some 100 people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1924 in source Emigration Commission Zagreb.