Balša Petar Hercegović (, 1458 - 1514) was the titular "Duke of St. Sava" (), as son of duke Vladislav Hercegović and Byzantine princess Anna Kantakouzene. He was born before the Ottoman conquest of the Bosnian Kingdom (1463). Sometime 1460, Vladislav sent Anna and their children to live in the Republic of Ragusa. His father was given the estate of Kalnik near Križevci, Croatia in 1469 by king Matthias Corvinus. Balša joined his father and remained in Hungary, where he was later active at the court of king Vladislaus II.
Historian D. Lovrenović noted that it was possible that he was Jelena Nelipić's son.Dubravko Lovrenović, Da li je Jelena Nelipčić bila majka Balše Hercegovica, Istorijski zbornik 7, Banja Luka, 1986
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