Iaso (//; Greek: Ἰασώ, Iasō) or Ieso (//; Greek: Ἰησώ, Iēsō) was the Greek goddess of recuperation from illness. The daughter of Asclepius, she had four sisters: Aceso, Aglæa/Ægle, Hygieia, and Panacea. All five were associated with some aspect of health or healing. For more information on the genealogy of Iaso, see Panacea.
The altar shows parts. One part is to Heracles, Zeus, and Apollo Healer, another is given up to heroes and to wives of heroes, the third is to Hestia and Hermes and Amphiaraus and the children of Amphilochus. But Alcmaeon, because of his treatment of Eriphyle, is honored neither in the temple of Amphiaraus nor yet with Amphilochus. The fourth portion of the altar is to Aphrodite and Panacea, and further to Iaso, Hygeia, and Athena Healer. The fifth is dedicated to the nymphs and to Pan, and to the rivers Achelous and Cephisus.
In the temple of Amphiaraus at Oropus a part of the altar was dedicated to her, in common with Aphrodite, Panaceia, Hygieia, and Athena Paeonia. Iaso had many children.
- Schmitz, Leonhard (1867). "Iaso". In William Smith (ed.). Dictionary of Greek and Roman Biography and Mythology. 2. Boston: Little, Brown and Company. p. 552.