In Croatia, Glavas families are Croats (from Labin area ).
Prevalence
About 10 people with faimily name Glavas live in Croatia today, in one household only. They are located in only two Croatian places: in Zagreb (<5) and Bicici in Labin area (<5).
Outside Croatia
Family name Glavas is present in 30 countries worldwide. The family name "Glavas " is used by some 800 people in Greece , about 600 in the United States , and some 200 people in Austria. "Glavash " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1935 in source Faculty of Humanities University of Zagreb Alumni.