Simon was the son of Imre St. Georgen und Pösing but his mother is unknown. The date and place of his birth have not been found.
Simon St. Georgen und Pösing
Imre St. Georgen und Pösing (-1462)
Péter St. Georgen und Pösing (-c1430)
György St. Georgen und Pösing (-1426)