https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9678726/ THe NATIONAL LIBRARY OF MEDICINE is with the UNITES STATES OF AMERICA GOVERNMENT...
Excerpt: The Hunyadi family is one of the most influential families in the history of Central Europe in the 14th - 16th centuries. The family's prestige was established by Johannes Hunyadi, a Turk-beater who rose to the position of governor of the Kingdom of Hungary. His second son, Matthias Hunyadi, because the elected ruler of the Kingdom of Hungary in 1458. The Hunyadi family had unknown origin. Moreover, Matthias failed to found a dynasty because of lacking a legitimate heir and his illegitimate son Johannes Corvinus was unable to obtain the crown. His grandson, Christophorus Corvinus, died in childhood, thus the direct male line of the family ended.
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This scientific article explores the DNA of the Corvinus (Crow) family heritage. Matthew the Crow or of the Crow clan, as I see it, is linked with the Hunyadi family.