Hunniades left two sons, Ladislaus and Matthias.

The king and Cilli manifested the meanest jealousy in reference to these young men, and fearful that the renown of their father, which had inspired pride and gratitude in every Hungarian heart, might give them power, they did every thing they could to humiliate and depress them.
The king lured them both to Buda, where he perfidiously beheaded the eldest, Ladislaus, for wounding Cilli, in defending himself from an attack which the implacable count had made upon him, and he also threw the younger son, Matthias, into a prison.
The widow of Hunniades, the heroic mother of these children, with a spirit worthy of the wife of her renowned husband, called the nobles to her aid.

They rallied in great numbers, roused to indignation.

The inglorious king, terrified by the storm he had raised, released Matthias, and fled from Buda to Vienna, pursued by the execrations and menaces of the Hungarians.
He soon after repaired to Prague, in Bohemia, to solemnize his marriage with Magdalen, daughter of Charles VII., King of France.

He had just reached the city, and was making preparations for his marriage in unusual splendor, when he was attacked by a malignant disease, supposed to be the plague, and died after a sickness of but thirty-six hours.