One mortal among three sisters
Hesiod names the Gorgons Stheno, Euryale, and Medusa among the children of Phorcys and Ceto. They live beyond Ocean toward Night. The first two are immortal; Medusa alone is mortal. Poseidon lies with her in a meadow, and when Perseus cuts off her head, Pegasus and Chrysaor emerge. The poem supplies genealogy, location, and a striking birth, but it does not explain her snakes as a punishment by Athena. That omission is a limit on this witness, not evidence that Hesiod has argued against a story composed centuries later.
Source: Theogony, in Hesiod, the Homeric Hymns, and Homerica · Theogony 270–286
Ovid’s account of the hair
In Ovid, Perseus answers a question about why Medusa alone had snakes in her hair. He says she once possessed celebrated beauty and especially admired hair. Neptune violated her in Minerva’s temple; Minerva turned away and then changed Medusa’s hair into snakes. The goddess wears those snakes on her breast to terrify enemies. This explanation assigns the visible consequence to the woman subjected to the god’s act. The passage does not identify Medusa as a priestess, nor say that the transformation was a protective gift intended to keep her safe. Those additions require other evidence.
Source: Metamorphoses, Books 1–7 · Metamorphoses 4.790–803
A dangerous image after death
Medusa’s head retains its power after separation from her body. In the Library, Perseus uses it against Polydectes and eventually gives it to Athena. The head becomes part of the goddess’s equipment, moving from the edge of the inhabited world into divine protection and display. The same figure can therefore be the object of a hero’s violence and the source of power that makes his later victories possible. The source switch separates a genealogy from an explanatory transformation. Neither selection should be promoted as a complete, universally accepted biography of Medusa.
Source: Library and Epitome · Library 2.4.2–3
One story, different sources
Choose a textual witness. The summary, diagram, and cited connections below change together. This is a selective map of claims, not a complete family tree.
Hesiod · a mortal Gorgon and her offspring
Hesiod places Medusa among three Gorgon sisters and makes Pegasus and Chrysaor emerge at her death. He gives no transformation of her hair by Athena.
Source: Theogony, in Hesiod, the Homeric Hymns, and Homerica · Theogony 270–286
Cited connections 4
Poseidon unites with Medusa
Source: Theogony, in Hesiod, the Homeric Hymns, and Homerica · Theogony 278–279
Medusa mother of Pegasus
Source: Theogony, in Hesiod, the Homeric Hymns, and Homerica · Theogony 280–283
Medusa mother of Chrysaor
Source: Theogony, in Hesiod, the Homeric Hymns, and Homerica · Theogony 280–283
Perseus beheads Medusa
Source: Theogony, in Hesiod, the Homeric Hymns, and Homerica · Theogony 280
Ovid · the explanation of the snake hair
Perseus’s answer describes Neptune’s violation of Medusa in Minerva’s temple and Minerva’s transformation of her hair. The selected passage is an explanation, not a complete genealogy.
Source: Metamorphoses, Books 1–7 · Metamorphoses 4.790–803
Cited connections 2
Neptune / Poseidon violates in Minerva’s temple Medusa
Source: Metamorphoses, Books 1–7 · Metamorphoses 4.798
Minerva / Athena changes hair into snakes Medusa
Source: Metamorphoses, Books 1–7 · Metamorphoses 4.799–803
See what differs across the witnesses
Hesiod · a mortal Gorgon and her offspring
Hesiod places Medusa among three Gorgon sisters and makes Pegasus and Chrysaor emerge at her death. He gives no transformation of her hair by Athena.
Source: Theogony, in Hesiod, the Homeric Hymns, and Homerica · Theogony 270–286
Ovid · the explanation of the snake hair
Perseus’s answer describes Neptune’s violation of Medusa in Minerva’s temple and Minerva’s transformation of her hair. The selected passage is an explanation, not a complete genealogy.
Source: Metamorphoses, Books 1–7 · Metamorphoses 4.790–803
- Period / witness
- Hesiod: around 700 BCE; Ovid: around 8 CE
- Recording context
- The Theogony and the Latin Metamorphoses preserve separate literary witnesses. Modern composite biographies often join details that these texts do not tell together.
A recording location is not necessarily a story’s origin. Dates of texts, copies, and translations answer different questions.
Explore time & place →Read the sources
These references support the explanation above. Rights and edition notes are recorded individually.
Theogony, in Hesiod, the Homeric Hymns, and Homerica ↗
Hesiod; translated by Hugh G. Evelyn-White · Ancient poem conventionally dated around 700 BCE; translation 1914; digital edition updated 2020
Edition & rights noteMetamorphoses, Books 1–7 ↗
Ovid; translated by Henry Thomas Riley · Latin poem completed around 8 CE; translation first published 1851; digital edition collates nineteenth-century printings
Edition & rights noteLibrary and Epitome ↗
Pseudo-Apollodorus (ancient author uncertain); translated by Sir James George Frazer · Greek compilation probably first or second century CE; ending survives through later epitomes; Frazer translation 1921; host text page dated 2026-10-05
Edition & rights note