In Croatia, Ballian families are Croats (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Middle Bosnia (Sarajevo area) and in Zagreb.
Prevalence
Only a few people with faimily name Ballian live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number remains constant. They are located in one Croatian city only, in Zagreb (<10).
Outside Croatia
Family name Ballian is present in 19 countries worldwide. "Ballyan " is used by few people in Poland and few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.