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Hephaestus and Medusa had a son named Cacus.

Cacus was the son of Hephaestus and Medusa. Inheriting the properties of fire from his father and monstrousness from his mother, Cacus was a fire-breathing monster who was sometimes described as a three-headed giant. He lived on human flesh and decorated his cave with the bones and skulls of his victims.

source: Cacus Versus Heracles by Nancy Conner, PhD

How were Hephaestus and Cacus shielded from being turned to stone? Does being a God shield them?

  • Great question! I didn't know about this creature at all. I took the liberty of editing the question with a reference to this not-so-well-known creature. Please, feel free to rollback if you don't like this change. – Kreann May 6 '15 at 19:35
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    Perhaps Medusa being Cacus mother can be traced to John Lemprière's "Bibliotheca Classica"? – femtoRgon May 6 '15 at 20:41
  • That link (the one in the question, not Lemprière's) is now broken. – C. M. Weimer Jul 11 '15 at 19:01
  • More importantly how and why would you try to have a child with medusa? – Nuloen The Seeker Apr 11 '18 at 5:53
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I don't really consider that a particularly good source. Virgil says that Cacus was Half Human, in the Aeneid, Book VIII:

There was a cave here, receding to vast depths,

untouched by the sun’s rays, inhabited by the fell shape

of Cacus, the half-human, and the ground was always warm

with fresh blood, and the heads of men, insolently

nailed to the doors, hung there pallid with sad decay.

Vulcan was father to this monster: and, as he moved

his massive bulk, he belched out his dark fires.

Now at last time brought what we wished, the presence

and assistance of a god.

Additionally, I have been unable to find a single corroborating citation to your source about Medusa being Cacus's mother. Especially since, as a Gorgon, Medusa was a Daughter of Phorcys and his sister Ceto, ancient Cthonic deities, and was therefore not human.

Finally, your source says that Cacus inherited Monstrousness from his mother, but we know that other children of Hephaestus were also monsters, for example in Apollonius I:

[202] With him came Palaemonius, son of Olenian Lernus, of Lernus by repute, but his birth was from Hephaestus; and so he was crippled in his feet, but his bodily frame and his valour no one would dare to scorn.


Side note: Being a God did not shield one from Medusa. See: How did Athena keep from being turned into stone by her shield?

  • Especially since, as a Gorgon, Medusa was a Daughter of Phorcys and his sister Ceto, ancient Cthonic deities, does this mean she can't have children? – Daft May 6 '15 at 21:13
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    ​​​​​​​​​​​​​​​@Daft No, it means any children she would have had with Vulcan wouldn't be human (or half-human), as neither she nor Vulcan were human. – yannis May 6 '15 at 21:41
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    Could Virgil's description of Cacus be just that- a physical description? So that Cacus might still be the son of Medusa and Hephastus, but Virgil calls him half-human as a description of his body? – user528 Jul 11 '15 at 14:34
  • Calling Palaemonius a "monster" just because he was "crippled in his feet" sounds a bit harsh. – Rodia Apr 11 '18 at 1:13
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Sorry for referencing wiki, but I don't have better source. I've just remembered this during reading of this question.

In a late version of the Medusa myth, related by the Roman poet Ovid (Metamorphoses 4.770), Medusa was originally a ravishingly beautiful maiden, "the jealous aspiration of many suitors," but because Poseidon had raped her in Athena's temple, the enraged Athena transformed Medusa's beautiful hair to serpents and made her face so terrible to behold that the mere sight of it would turn onlookers to stone.

In Ovid's telling, Perseus describes Medusa's punishment by Minerva (Athena) as just and well earned.

So if I assume right, not in all her life was Medusa "able" to turn anybody into stone. If she had given born to Casus before her transformation, he didn't have to be "shielded".

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None of the quotes relating to Cacus on Theoi.com mention who his mother was, only that his father was Hephaistos. Cacus was only known for trying to steal Hercules' cattle, and as a minor character he wasn't provided with a lot of backstory, which might explain why we know so little about him.

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