In Croatia, Mrinjek families are Croats (from Vrbovec area ). In the past century, relatively most of Croatian residents bearing this family name were born in Vrbovec area and in Zagreb. In Mali Brezovec in Vrbovec area every fifth inhabitant had the family name Mrinjek.
Prevalence
About 30 people with faimily name Mrinjek live in Croatia today, in 13 households. There were 40 of them in the middle of the past century, and their number decreased by 30 percent. They are located in threee Croatian counties, threee cities and 5 other places, mostly in Zagreb (10), Gradecki Pavlovec in Vrbovec area (<10), Vrbovec (<5), Gradec in Vrbovec area (<5), and in Gostovic (<5).
Outside Croatia
Family name Mrinjek 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 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.