Glas families are Croats and they are mostly from Klanjec. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Klanjec.
Prevalence
About 180 people with faimily name Glas live in Croatia today, in 80 households. There were 240 of them in the middle of the past century, and their number decreased by 30 percent. They are located in the most of Croatian counties, in 17 cities and 29 other places, mostly in Zagreb (45), Benkovo (20), Bobovec Tomasevecki (15), Slavonski Brod (10), and in Rakovec Tomasevecki (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.