Roca families are Croats and they are mostly from Vodice. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and Vodice.
Prevalence
About 240 people with faimily name Roca live in Croatia today, in 90 households. There were 210 of them in the middle of the past century, and their number increased by 10 percent. They are located in 10 Croatian counties, in 14 cities and 5 other places, mostly in Vodice (155), Zagreb (55), Sibenik (15), Vukovar (<10), and in Split (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.