In Croatia, Kalečak families are Croats (from Cazma area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Zlatar area.
Prevalence
About 20 people with faimily name Kalečak live in Croatia today, in 9 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in only two naselja i to in Zagreb (15) and Sesvete (<10).
Outside Croatia
Family name Kalečak (including: Kalecak , Kaleciak ) is present in four countries on two continents. "Kaleciak " is used by small number of people in Poland and small number in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.