Complex sentence: Cynocephaly was familiar to the Ancient Greeks from representations of the Egyptian god Hapy, the son of Horus, Anubis, the Egyptian god of the dead, always shown with the head of a jackal.
Split into simpler sentences: Cynocephaly was familiar to the Ancient Greeks from representations of the Egyptian god Hapy, the son of Horus. And, of course, Anubis the Egyptian god of the dead was always shown with the head of a jackal.