Sadak families are Croats and they are mostly from Jastrebarsko area. In the past century, relatively most of Croatian residents bearing this family name were born in Sisak and Cazma. In Velika Jamnička in Jastrebarsko area every ninth inhabitant had the family name Sadak.
Prevalence
About 70 people with faimily name Sadak live in Croatia today, in 30 households. There were 130 of them in the middle of the past century, and their number halved. They are located in four Croatian counties, threee cities and 13 other places, mostly in Hrastelnica (10), Velika Jamnicka in Jastrebarsko area (<10), Zagreb (<10), Sisak (<10), and in Pisarovina in Jastrebarsko area (<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.