Moćan families are Croats and they are mostly from Slunj. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Slunj.
Prevalence
About 150 people with faimily name Moćan live in Croatia today, in 60 households. There were 160 of them in the middle of the past century, and their number decreased by 10 percent. They are located in the most of Croatian counties, in 17 cities and 18 other places, mostly in Zagreb (20), Karlovac (20), Slunj (10), Samobor (10), and in Resetari in Nova Gradiska area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.