Flac families are Croats and they are mostly from Mursko Sredisce area. In the past century, relatively most of Croatian residents bearing this family name were born in Cakovec and in Mursko Sredisce area.
Prevalence
About 150 people with faimily name Flac live in Croatia today, in 60 households. There were 170 of them in the middle of the past century, and their number decreased by 10 percent. They are only located in in 8 Croatian cities and 23 other places, mostly in Donji Koncovcak in Mursko Sredisce area (25), Cakovec (15), in Gradiscak (15) and Kapelscak (10) in Mursko Sredisce area, and in Koprivnica (<10).
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.