In Croatia, Kalec families are Croats (from Slatina ). In the past century, relatively most of Croatian residents bearing this family name were born in Slatina and Virovitica.
Prevalence
Only a few people with faimily name Kalec live in Croatia today, in three households only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in two Croatian cities only, in Slatina (<5) and Zagreb (<5).