Ladislaus (III) Kán, was a Hungarian oligarch in the Kingdom of Hungary who ruled de facto independently Transylvania. He held the office of Voivode of Transylvania (erdélyi vajda). Taking advantage of the internal discords within the kingdom, he could maintain his rule over Transylvania until his death even by struggling against the several claimants for the throne.

The Voivode of Transylvania was the highest-ranking official in Transylvania within the Kingdom of Hungary from the 12th century to the 16th century. Appointed by the monarchs, the voivodes – themselves also the heads or ispáns of Fehér County – were the superiors of the ispáns of all the other counties in the province.