Hygieia is a goddess from Greek mythology (also referred to as: Hygiea or Hygeia; haɪˈdʒiːə; Ὑγιεία or Ὑγεία, Hygēa or Hygīa). Hygieia is a goddess of health (ὑγίεια – hugieia), cleanliness and hygiene. Her name is the source for the word "hygiene".
Hygieia is related to the Greek god of medicine, Asclepius, who is the son of the Olympian god Apollo. Hygieia is most commonly referred to as a daughter of Asclepius and his wife Epione. Hygieia and her four sisters each performed a facet of Apollo's art: Hygieia (health, cleanliness, and sanitation); Panacea (universal remedy); Iaso (recuperation from illness); Aceso (the healing process); and Aegle (radiant good health).
One notable reference regarding Hygieia's role as a goddess of health can be found within the Hippocratic oath. This oath is used by physicians in order to swear before various healing gods, one of which being Hygieia, that they would follow a code of established ethical standards of practice.
Section of the translated oath from Greek to English:
I swear by Apollo Healer, by Asclepius, by Hygieia, by Panacea, and by all the gods and goddesses, making them my witnesses, that I will carry out, according to my ability and judgment, this oath and this indenture.
The worship of Hygieia was closely associated with the cult of Asclepius. While Asclepius was more directly associated with healing, Hygieia was associated with the prevention of sickness and the continuation of good health. In the second century CE, the famous traveler Pausanias provided an account based on what he witnessed within the state of Greece. In his encyclopedic text Description of Greece, written circa 160 CE to 174 CE, Pausanias described encountering statues of Asclepius and Hygieia, located at Tegea.
In addition to statues which represent the two figures, the incorporation of Hygieia within the cult of Asclepius can also be seen in medical iconography on numerous ancient Graeco-Roman coins. The close association between Hygieia and Asclepius indicates the important place she held in the cult of Asclepius.