Complex sentence: His son was Antonino Natoli, Lord of the Castle of Patti, Sicily, who married Francesca D'Amato and had two sons, Simone and Gerardo Natoli.
Split into simpler sentences: His son was Antonino Natoli, Lord of the Castle of Patti, Sicily, who married Francesca D'Amato. They bore two sons, Simone and Gerardo Natoli.