In Greek mythology, Anaxibia (Ancient Greek Ἀναξιβία) is the Atreid princess — sister of Agamemnon and Menelaus — who marries Strophius king of Phocis and becomes mother of Pylades. Alternate names in the tradition include Astyoche and Cydragora.
Adapted from Wikipedia, "Anaxibia" · CC BY-SA 4.0
I.Atreid sister and mother of Pylades
Pausanias and the scholia on Euripides' Orestes place Anaxibia as sister of Agamemnon and Menelaus and wife of Strophius of Phocis; their son is Pylades, the steadfast companion of Orestes. Hyginus and related lists preserve the same Phocian marriage under variant maternal names (Astyoche, Cydragora).
The match joins the Pelopid house at Mycenae to the Aeacid line in Phocis and supplies the kinship frame for Orestes' exile and return.
II.Homonym care
The atlas id anaxibia-atreid is this Atreid queen alone. Distinct from anaxibia-pelias (wife of Pelias, mother of Alcestis), anaxibia-nestor (Apollodorus' wife of Nestor), and the Danaid Anaxibia.