Martinis families are Croats and they are mostly from the Island of Vis. In the past century, relatively most of Croatian residents bearing this family name were born in Split and Zagreb.
Prevalence
About 170 people with faimily name Martinis live in Croatia today, in 70 households. There were 160 of them in the middle of the past century, and their number increased by 10 percent. They are located in 6 Croatian counties, in 11 cities and 5 other places, mostly in Zagreb (65), Split (50), Komiza on the Island of Vis (30), Rovinj (<10), and in Rijeka (<10).
Outside Croatia
At least 14 families with this surname emigrated from Croatia to: the United States (10), Bolivia (2), and to Australia (2). Family name Martinis is present in 30 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1923 in source Emigration Commission Zagreb.