In Croatia, Čajkušić families are Croats (from Djakovo area ). In the past century, relatively most of Croatian residents bearing this family name were born in Split and Zagreb.
Prevalence
About 30 people with faimily name Čajkušić live in Croatia today, in 17 households. There were 50 of them in the middle of the past century, and their number decreased by 40 percent. They are located in 8 Croatian counties, in 7 cities and 8 other places, mostly in Split (10), Zagreb (<10), Stari Mikanovci in Djakovo area (<10), Zupanja (<5), and in Knin (<5).
Outside Croatia
Family name Čajkušić is present in three countries on three continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1930 in source Emigration Commission Zagreb.