In Croatia, Ručić families are Croats (from Sisak ). In the past century, relatively most of Croatian residents bearing this family name were born in Sisak. In Mužilovčica in Sisak every ninth inhabitant had the family name Ručić.
Prevalence
Only a few people with faimily name Ručić live in Croatia today, in three households only. There were 50 of them in the middle of the past century, and their number decreased significantly. They are located in only four naselja i to in Muzilovcica (<10), Sibenik (<5), Sisak (<5), and in Porec (<5).