In Croatia, Sedlak families are generally Croats (from Vukovar area ), very rarely Hungarians (from Zagreb ). In the past century, relatively most of Croatian residents bearing this family name were born in Backa, Vojvodina and in Glina.
Prevalence
About 20 people with faimily name Sedlak live in Croatia today, in 9 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in 7 Croatian counties, four cities and four other places, mostly in Ilok (<5), Viskovo in Rijeka area (<5), Petrovci in Vukovar area (<5), Zagreb (<5), and in Glina (<5).
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.