maybe it is a bit far fetched, but my name "Broucek" by Germans mostly is pronounced as "Pruschek". Broucek is a rather common Czech name. A sort of "nest" is near Budweis in a village named Neplachov. Perhaps a person from this village went to a region where people spoke mostly german and adapted his name to his new surroundings. Maybe this is a false route, maybe its intresting.