Jocasta

In Greek legend, the wife of King Laius of Thebes and mother of Oedipus, later unwittingly becoming the wife of her son; she is called Epikaste in Homer. She bore Oedipus four children - Eteocles, Polynices, Antigone, and Ismene - and killed herself when she discovered her incest.

In Greek mythology, Jocasta, also Iocaste (Iοκαστη) or Epikastê, was a daughter of Menocenes, Queen of Thebes, who unwittingly married Oedipus, her own son. She was the wife of Laius and Oedipus her son by Laius. Mother (by Laius) of Oedipus, and mother (by Oedipus) of Antigone, Eteocles, Polynices and Ismene.

Her husband, King Laius of Thebes, consulted an oracle when she was pregnant with her first child, Oedipus. He was found by a shepherd and given to King Polybus and Queen Merope (or Periboea) of Corinth

Later, Oedipus killed Laius, not knowing who he was, and married Jocasta, not knowing who she was. When this was discovered, not able to bear the truth, Jocasta committed suicide by hanging herself and Oedipus tore out his own eyes with Jocasta's brooches. However, in the Phoenician Women by Euripides, Jocasta doesn't commit suicide until she witnesses the death of her sons Eteocles and Polynices who have slain each other in a battle for Thebes. The first, Oedipus, with her first husband, Laius.

In astronomy, Iocaste is the name of a small moon of the planet Jupiter.
In the Marvel Universe, Jocasta is a superheroine.
In Star Wars Episode II: Attack of the Clones and Star Wars Episode III: Revenge of the Sith, Jocasta Nu is the name of the librarian at the Jedi Archives during the Clone Wars.