a popular hypothesis

/!\ technical profile to at least remove her as a well known sourced legitimate daughter /!\

Viola's father's origins are disputed by historians.

• Chronicler Jan Długosz noted that she was originally from Bulgaria.[1][2][3]
• A more popular hypothesis about Viola's parentage was given by Władysław Dziewulski, who stated that she could be the daughter of either Kaloyan of Bulgaria or his successor Boril,[4][5] but this theory has been challenged by Wincenty Swoboda.[6]
• Jerzy Horwat put forward another hypothesis, under which Viola could have been a daughter of either King Béla III from his second marriage to Margaret of France or his son and successor, Emeric.[7]
• Today, historians widely favor that the origins of Viola are unknown.[7]

1. https://en.wikipedia.org/wiki/Viola,_Duchess_of_Opole#Origins

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