Margaret of Bavaria, Duchess of Slavonia

Margaret of Bavaria (1325–1374) was the eldest daughter of Emperor Louis IV and Margaret II, Countess of Hainaut. In 1351 she married Stephen, Duke of Slavonia, youngest son of King Charles I of Hungary. When Stephen died in 1354, she ruled Slavonia, Croatia and Dalmatia as regent for their infant son John, the heir presumptive to Hungary and Poland.

She remarried Gerlach von Hohenlohe in 1356, but in that year's war with Venice the Hungarian crown ended the duchy's autonomy and removed her from power. John died in 1360, and Margaret died in 1374.