According to my inquiry, Creon is the mythical Thebes of Greece (the main city of Pio in central and eastern Greece, and one of the important cities and powerful countries in ancient Greece). It is said that Thebes was founded by Cadmus. ) Wang, son of Menochus; Jocasta is the daughter of Menokus, the wife of Raius, and the mother and wife of Oedipus.

As can be seen from the above, Creon and Jocasta are brothers and sisters.

I hope I can help you!