Péter was the son of Miklós Széchy de Rimaszécs and Dorottya Derencsényi. The date and place of his birth have not been found.
Péter Széchy de Rimaszécs
Miklós Széchy de Rimaszécs
Frank Széchy de Rimaszécs
Dénes Széchy de Rimaszécs
Dorottya Derencsényi
Imre Derencsényi
János Derencsényi
Jusztina Gálszécsi