Andrew, Duke of Slavonia (Hungarian: András szlavóniai herceg; 1268–1278) was the youngest son of King Stephen V of Hungary and his wife, Elizabeth the Cuman.
Two rebellious lords kidnapped him in 1274 in an attempt to play him off against his brother, Ladislaus IV of Hungary, but the king's supporters liberated him.
[4] In theory, Ladislaus's ruled under the regency of his mother, Elizabeth, but in fact, competing parties of the most wealthy noble families, including the Csáks and Kőszegis, were fighting against each other for the control of government.
[5][6][7] However, Kőszegi's and Gutkeled's rival, Peter Csák, and his allies annihilated their united troops in late September and liberated Andrew.
[10][12] However, an adventurer announced that he was identical with King Ladislaus's younger brother, claiming Hungary to himself against Andrew III.