Boros-Kazai 2005, p. 339. Boros-Kazai, András (2005). "Hungary". In Frucht, Richard (ed.). Eastern Europe: An Introduction to the People, Lands, and Culture. ABC Clio. pp. 329–412. ISBN1-57607-801-9.
Boros-Kazai 2005, p. 340. Boros-Kazai, András (2005). "Hungary". In Frucht, Richard (ed.). Eastern Europe: An Introduction to the People, Lands, and Culture. ABC Clio. pp. 329–412. ISBN1-57607-801-9.
A charter from April 1456 (source: Teleki József. Hunyadiak kora Magyarországon p.495) mentions Clara as John Hunyadi's maternal sister. However, taking into account the uncertainty of medieval terminology, she may well have been his full sister, according to historian András Kubinyi. Her second son, Andrew Pongrác of Dengeleg was King Matthias Corvinus's Master of the cupbearers, and his younger brother, John Pongrác of Dengeleg served the King as Voivode of Transylvania for eight years.
Heltai, Gáspár (2000). "Krónika a magyarok dolgairól [=Chronicle of the Deeds of the Hungarians]". Régi magyar irodalmi szöveggyűjtemény II (szerkesztette Jankovics József, Kőszeghy Péter és Szentmártoni Szabó Géza [Collection of Ancient Hungarian Literary Texts (Edited by József Jankovics, Péter Kőszeghy and Géza Szentmártoni Szabó)]. Balassi Kiadó. Retrieved 2014-04-20.