Pelopia

The name Pelopia (Πελόπεια) appears across multiple Greek saga cycles and does not denote a single origin tale. As recorded in the surviving summaries, one Pelopia is counted among the Niobids, daughters of Amphion and Niobe, and is slain by Artemis in the Niobid massacre tradition. Another Pelopia is enumerated among the daughters of Pelias of Iolcus: she appears in Argonautic material as the sister who gives Acastus a folded mantle before his voyage and later, with her sisters, is tricked by Medea into killing their father Pelias in a false rejuvenation ritual. A different Pelopia is named as mother of Cycnus by Ares in Ares‑related genealogies. The best-attested narrative instance is Pelopia, daughter of Thyestes in the Atreid cycle: she becomes pregnant by Thyestes (accounts vary on the precise circumstances of the assault), bears Aegisthus (whose exposure/raising varies by retelling), and—after recognizing Thyestes as the attacker when a weapon is revealed—stabs herself with her father’s sword while Aegisthus later kills Atreus and restores Thyestes’ line. Across these appearances the name functions as a genealogical and narrative marker rather than describing a unified mythic personage.

The supplied sources offer no sustained physical description for any Pelopia. Identification in the traditions is by kinship, role, and actions (daughter of Amphion and Niobe; daughter of Pelias; mother of Cycnus by Ares; daughter of Thyestes and mother of Aegisthus) rather than by clothing, features, or other distinguishing bodily traits. Surviving summaries and retellings therefore emphasize familial relation and narrative function instead of appearance.

No supernatural powers or abilities are attributed to figures named Pelopia in the provided material; they are mortal women whose significance derives from social and narrative actions. Their reported behaviours include participation in dynastic and tragic episodes: one is slain by a god (Artemis) as part of the Niobid punishment; the Iolcan Pelopia gives a mantle to Acastus and—along with her sisters—performs the killing of Pelias after being deceived by Medea into thinking it would rejuvenate their father; the Thyestean Pelopia becomes the mother of Aegisthus following sexual violence and, upon recognition of her attacker, fatally wounds herself. These behaviors are social and tragic rather than magical, and they function to advance motifs of familial violence, vengeance, exposure of children, and questions of dynastic legitimacy.