Moguljak families are Croats and they are mostly from Pregrada area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Pregrada area. In Dugnjevec in Pregrada area every third inhabitant had the family name Moguljak.
Prevalence
About 100 people with faimily name Moguljak live in Croatia today, in 40 households. There were 100 of them in the middle of the past century, and their number remains constant. They are located in 6 Croatian counties, in 7 cities and 11 other places, mostly in Zagreb (40), Dugnjevec in Pregrada area (15), Bjelovar (<10), Voloder in Kutina area (<10), and in Prosenik in Klanjec area (<10).
Outside Croatia
Family name Moguljak is present in three countries.
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.