Mravak families are Croats and they are mostly from Sinj area. In the past century, relatively most of Croatian residents bearing this family name were born in Sinj and in Sinj area.
Prevalence
About 330 people with faimily name Mravak live in Croatia today, in 130 households. There were 200 of them in the middle of the past century, and their number increased by 70 percent. They are located in the most of Croatian counties, in 17 cities and 16 other places, mostly in Split (85), Obrovac Sinjski (75), Gala in Sinj area (55), Zagreb (25), and in Sinj (25).
Outside Croatia
At least three families with this surname emigrated from Croatia to Germany (2) and the United States (1). Family name Mravak is present in 8 countries on three continents. "Mravac " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.