In Greek mythology, Erigone (Ancient Greek Ἠριγόνη, "early-born") is the daughter of Aegisthus and Clytemnestra, rulers of Mycenae after Agamemnon's murder. In one tradition she brings Orestes to trial for killing her parents; in another Artemis rescues her when Orestes would have slain her after reclaiming the throne. Other accounts marry her to Orestes or make her mother of his son Penthilus. She is distinct from Erigone daughter of Icarius.
Adapted from Wikipedia, "Erigone (daughter of Aegisthus)" · CC BY-SA 4.0
I.Family
As daughter of Clytemnestra and Aegisthus, Erigone is full sister of Aletes (and, in some lists, of a Helen by that pair) and half-sister to Orestes, Electra, Iphigenia, and Chrysothemis, the children of Agamemnon and Clytemnestra.
II.Mythology
After Orestes killed Aegisthus and Clytemnestra, Apollodorus and related notices have Erigone prosecute him for the murders. While Orestes was abroad — hunted by the Erinyes and, in the Taurian tale, reunited with Iphigenia — her brother Aletes seized Mycenae on a false report of Orestes' death. Orestes returned, slew Aletes, and would have killed Erigone as well had Artemis not carried the girl away to serve as her priestess (Hyginus).
In other traditions Erigone becomes Orestes' wife or mistress and bears him children — Penthilus, and sometimes Tisamenus (more usually Hermione's son). Lost tragedies titled Erigone (Sophocles and others) may have treated either this heroine or the Attic namesake; the texts do not survive.
III.Homonyms
This atlas entry (erigone) is the Mycenaean daughter of Aegisthus and Clytemnestra. Distinct from Erigone daughter of Icarius of Athens (erigone-icaria), who hanged herself after finding her father's body and was placed among the stars as Virgo.