In Croatia, Prochaska families are Croats (from Grubisno Polje ). In the past century, relatively most of Croatian residents bearing this family name were born in Grubisno Polje.
Prevalence
Only a few people with faimily name Prochaska live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in only two naselja i to in Veliki Zdenci (<5) and Sibovac in Daruvar area (<5).
Outside Croatia
Family name Prochaska is present in 31 countries worldwide. The family name "Prochaska " is used by some 4000 people in the United States , about 1000 in Germany , and some 500 people in Austria.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.