Complex sentence: Copreus was said to be a son of Pelops and Hippodameia; he himself had a son named Periphetes, who features in the "Iliad" as an honorable warrior.
Split into simpler sentences: Copreus was said to be a son of Pelops and Hippodameia. He himself had a son named Periphetes, who features in the "Iliad" as an honorable warrior.