Pongrác had inherited estates in Upper Hungary (present-day Slovakia), but was forced to renounce them in exchange for landed property he and Justina jointly received in Transylvania following their marriage.

[1] Accepting the credibility of the earlier document, historians András Kubinyi and Tamás Fedeles say Osvát Szilágyi and his wife, Ágota Pósa of Szer, were Justina's parents.

[3][4] On the other hand, historians Pál Engel and Mihai-Florin Hasan concluded that Justina was the daughter of Ladislaus and his unknown wife, in accordance with the 1496 document.

[1] Matthias Corvinus gave Justina into marriage to Wenceslas (also known as Ladislaus) Pongrác of Szentmiklós,[5] a member of an influential noble family which owned estates in Upper Hungary (now Slovakia).

[5][6] Corvinus forced Pongrác to surrender the fortress of Sztrecsény (now Strečno) and the town of Zsolna (present-day Žilina), in exchange for Transylvanian estates, including Gernyeszeg (now Gornești in Romania), which had been confiscated from the Erdélyi of Somkerék and Suki families in 1467.

[6] Matthias Corvinus had Vlad the Impaler, Voivode of Wallachia, imprisoned for allegedly conducting secret negotiations with the Ottoman Empire in 1462,[7] and only released him in early 1475.

[14] Vlad invaded Wallachia with Hungarian and Moldavian support forcing Basarab Laiotă to flee to the Ottoman Empire, in November 1476.

[17] Hasan and Matei Cazacu proposed that Justina gave birth to Vlad's second son and namesake, who was the ancestor of the Hungarian noble Drakwla family.