波列斯瓦夫一世
Marcin Bielski states that Bolesław I Chrobry settled some Germans in the region to defend the borders against Hungary and Kievan Rus' but the arrivals were ill-suited to their task and turned to farming. Maciej Stryjkowski mentions German peasants near Przeworsk, Przemyśl, Sanok, and Jarosław, describing them as good farmers.