Iris is most noted latterly as the goddess of the rainbow, but originally she was the messenger of the pre-Olympian gods, the Titans like Cronos and Rhea, a function later performed by Hermes and his Roman counterpart Mercury.
Isis was the chief goddess of ancient Egypt, daughter of Geb (the earth) and Nut (the sky), wife of Osiris (who was also her brother) and mother of Horus. She was a patron of motherhood, special protectress of slaves and the poor.
Ixion was a king of ancient Greece, a son of the god Ares, and the first murderer in Greek myth. His story is a complicated one, involving many crimes and infractions of rules, especially of the social contract between hosts and guests.