In Croatia, Kloc families are Croats (from Kutina ). In the past century, relatively most of Croatian residents bearing this family name were born in Pleternica area and in Ivanic-Grad.
Prevalence
About 10 people with faimily name Kloc live in Croatia today, in five households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are only located in four Croatian cities and threee other places, mostly in Janja Lipa (<5), Virovitica (<5), Brodski Stupnik in Pleternica area (<5), Djurdjekovec (<5), and in Zagreb (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.