In Croatia, Bošćak families are Croats (from Novi Marof area ). In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and in Novi Marof area.
Prevalence
About 10 people with faimily name Bošćak live in Croatia today, in five households only. There were 30 of them in the middle of the past century, and their number decreased significantly. They are only located in two Croatian cities and 5 other places, mostly in Djurinovec in Novi Marof area (<10), Aljmas in Vinkovci area (<5), Krizevci (<5), and in Nedelisce (<5) and Puscine (<5) in Cakovec area.
Outside Croatia
Family name Bošćak (including: Boscak , Boschnak ) is present in four countries on two continents. The family name "Boscak " is used by few people in the United States.
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.