Echephron in Greek Mythology was

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a son of Nestor

Apollod. 1.9.9

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a son of Priam:

Apollod. 3.12.5

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a son of Heracles and Psophis

Paus. 8.24.2,

Having been brought up here, Echephron and Promachus, the sons of Heracles and the Sicanian woman, changed the name of Phegia to Psophis, the name of their mother.
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Paus. 8.24.6

In Psophis there is a sanctuary of Aphrodite surnamed Erycine; I found only ruins of it remaining, but the people said that it was established by the sons of Psophis. Their account is probable, for in Sicily too, in the territory of Eryx, is a sanctuary of Erycine, which from the remotest times has been very holy, and quite as rich as the sanctuary in Paphos.

The hero-shrines, however, of Promachus and Echephron, the sons of Psophis, were no longer distinguished when I saw them.

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