In Croatia, Mesnjak families are Croats (from Sisak ). In the past century, relatively most of Croatian residents bearing this family name were born in Sisak and Samobor.
Prevalence
About 20 people with faimily name Mesnjak live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in three Croatian cities only: in Sisak (15), Zagreb (<5), and in Samobor (<5).
Outside Croatia
Family name Mesnjak is present in four countries on two continents. "Mesnyak " is used by few people in the United States.
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.