Source Verification: Nereus
Every claim below is either what a named ancient source attests, in its own line or section, or a point where the sources themselves disagree.
What the Sources Attest
Who are Nereus's parents?
Pontus and Gaia. Hesiod's Theogony names Nereus as the eldest of the five children Pontus fathers on his own mother Gaia, making him a member of the sea's oldest divine generation, older than the Titans.
Source: Hesiod, Theogony 233-236
What makes Nereus different from the other sea gods in Hesiod's Theogony?
His character. Hesiod gives Nereus's siblings, Thaumas, Phorcys, Ceto, and Eurybia, a single descriptive epithet each, but singles Nereus out for an ethical portrait: he is "true and lies not," gentle, and mindful of just and kindly thoughts, a moral distinction the poem does not bother making for almost any other minor deity.
Source: Hesiod, Theogony 233-236
Who are Nereus's children?
With the Oceanid Doris, Nereus fathers the fifty Nereids, sea nymphs Hesiod names individually. The two most consequential by later myth are Thetis, who becomes the mother of Achilles, and Amphitrite, who marries Poseidon and bears Triton.
Source: Hesiod, Theogony 240-264
How does Heracles get information out of Nereus?
By force, the same way later heroes extract truths from shape-shifting sea gods. Guided to him by nymphs of the river Eridanus during his search for the Hesperides, Heracles seizes the sleeping Nereus and holds on through every shape he takes, until the sea god gives up the location of both the apples and the Hesperides themselves.
Source: Apollodorus, Library 2.5.11
Is Amphitrite Nereus's daughter or Oceanus's?
Nereus's. Hesiod's own catalogue of the fifty Nereids names Amphitrite among them directly, making her Nereus and Doris's daughter rather than one of the three thousand Oceanids born to Oceanus and Tethys, even though her marriage to Poseidon later makes her queen of the sea in her own right.
Source: Hesiod, Theogony 240-264
Is Nereus the same figure as Proteus, the other shape-shifting Old Man of the Sea?
No. Nereus and Proteus are genealogically unrelated in every surviving source, Nereus a son of Pontus and Gaia, Proteus tied instead to Egypt and Poseidon's service in Homer. But both carry the identical epithet, and both stories force a hero to physically hold a shape-shifting sea god through every transformation to win a truth, which is very likely two separate uses of one shared folk-tale pattern rather than one figure under two names.
Source: Hesiod, Theogony 233-236
Where Accounts Differ
- whether Nereus and Proteus are the same figure
- Nereus's parallel with Proteus (shared epithet, shared forced-transformation-prophecy structure) is treated here as a real, source-attested pattern, not an identification of the two figures, which no ancient source makes.
Sources
- Hesiod, Theogony 233-236
- Hesiod, Theogony 240-264
- Apollodorus, Library 2.5.11
- Timothy Gantz, Early Greek Myth (1993)