In Croatia, Mrva families are almost entirely Croats (from Slatina area ), barely Slovenes, and . In the past century, relatively most of Croatian residents bearing this family name were born in Slatina area and in Virovitica. In Miljevci in Slatina area every thirtieth inhabitant had the family name Mrva.
Prevalence
About 60 people with faimily name Mrva live in Croatia today, in 20 households. There were 50 of them in the middle of the past century, and their number increased by 10 percent. They are located in 8 Croatian counties, in 9 cities and 7 other places, mostly in Zadar (20), Slatina (10), Ugljan on the Island of Ugljan (<10), Zagreb (<10), and in Miljevci in Slatina area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1926 in source Emigration Commission Zagreb.