Andrew III of Hungary
Ladislaus IV died in 1290 leaving no sons, and a civil war between rival candidates Andrew III of Hungary, and Charles Martel of Anjou started. Through mother Catherine of the Hungarian Árpád dynasty, brother Stefan Vladislav II received the duchy of Slavonia in 1292. In 1293, Vladislav married Constanza Morosini, a relative of Andrew III on his maternal side. Charles Martel was supported by Croatian nobleman Paul I Šubić of Bribir, who received the right to Gvozd and Neretva rivers after Charles had managed to assert his rule over parts of Croatia.