In Croatia, Mrnjavčić families are Croats (from Krizevci ). In the past century, relatively most of Croatian residents bearing this family name were born in Krizevci and Koprivnica. In Pavlovec Ravenski in Krizevci every ninth inhabitant had the family name Mrnjavčić.
Prevalence
About 30 people with faimily name Mrnjavčić live in Croatia today, in 13 households. There were 50 of them in the middle of the past century, and their number decreased by 30 percent. They are located in four Croatian counties, four cities and 5 other places, mostly in Zagreb (10), Mali Raven (<10), Veliki Raven (<10), Krizevci (<10), and in Vrbovec (<5).
Outside Croatia
Family name Mrnjavčić 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 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.