In Croatia, Glok families are Croats (from Osijek ).
Prevalence
Only a few people with faimily name Glok live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in one Croatian city only, in Osijek (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1673 in source Catholic Church Parish Records.