István was the son of Imre Bogáthy de Bogáth and Borbála Vízaknai. The date and place of his birth have not been found.
His wife was Ilona Farkas de Harinna. They were married, but the date and place have not been found. Their seven known children were János (?-?), István (?-?), Miklós (?-?), Imre (?-?), Margit (?-?), Péter (?-?) and Anna (?-?).
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