Boleslaus II
After the death of Duke Bolesław I in 1431, the rule over the duchy was shared by his wife Euphemia and their four sons. In 1442 the duchy was divided between the brothers who all bore the ducal title; nevertheless, the real control over the duchy passed to Boleslaus II and Przemyslaus II, who after the death of Boleslaus II in 1452 ruled alone. From the late 15th century onwards, the Beskid valleys in the south were settled by Vlach peasants from neighbouring Moravian Wallachia.