In Croatia, Masier families are Croats (from Bosnian Posavina ). In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Brcko area).
Prevalence
Only a few people with faimily name Masier live in Croatia today, in two households only. There were 0 of them in the middle of the past century, and their number remains constant. They are located in two Croatian counties, in one city and another small place , mostly in Zagreb (<5) and Okrug Gornji on the Island of Ciovo (<5).
Outside Croatia
Family name Masier (including: Massier , Massierer and Mashier ) is present in 29 countries worldwide.