Stephen, Duke of Slavonia

Stephen of Anjou (1332–1354), Hungarian István, was the youngest surviving son of Charles I of Hungary and Elizabeth of Poland. Styled Duke of Slavonia as a child, he took no part in governing it. In 1349 his brother Louis gave him his own household and made him Duke of Transylvania.

As his childless brother's heir, he and his mother governed during Louis's Neapolitan campaign in 1350. Late that year he married Margaret of Bavaria, daughter of Emperor Louis IV, despite Pope Clement VI's sharp opposition.

The match made him unpopular in Poland, whose nobles accepted Louis as Casimir III's heir in 1351 only on condition that Stephen be kept from office. Later given Croatia and Dalmatia, he died in 1354 returning from a campaign against Serbia; his infant son John inherited his duchy.