Guljelmović families are Croats and they are mostly from Dubrovnik. In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik and Zagreb.
Prevalence
About 60 people with faimily name Guljelmović live in Croatia today, in 30 households. There were 30 of them in the middle of the past century, and their number doubled. They are located in threee Croatian counties, two cities and 5 other places, mostly in Cavtat in Dubrovnik area (45), Zagreb (<10), Soline in Dubrovnik area (<10), Dubrovnik (<5), and in Cibaca in Dubrovnik area (<5).
Outside Croatia
Family name Guljelmović is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.