In Croatia, Mastelić-Ivić families are Croats (from Sinj ). In the past century, relatively most of Croatian residents bearing this family name were born in Sinj and Split.
Prevalence
About 20 people with faimily name Mastelić-Ivić live in Croatia today, in 11 households. They are located in five Croatian cities only: in Karlovac (<10), Brnaze (<10), Zagreb (<5), Split (<5), and in Solin (<5).
Outside Croatia
Family name Mastelić-Ivić is present in this form only in Croatia.
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.