In Croatia, Ottochian families are predominantly Croats (from Pazin area ), rarely Italians (from Rovinj ). In the past century, relatively most of Croatian residents bearing this family name were born in Pula and Rijeka.
Prevalence
About 10 people with faimily name Ottochian live in Croatia today, in 7 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in two Croatian counties, threee cities and threee other places, mostly in Rovinj (<10), Viskovo in Rijeka area (<5), Pula (<5), Vadediji in Pazin area (<5), and in Rijeka (<5).
Outside Croatia
Family name Ottochian is present in 7 countries on three continents. The family name "Ottochian " is used by small number of people in the United States and small number in Italy.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.