In Greek mythology, Demonassa (Ancient Greek: Δημωνάσσα) was a daughter of the seer Amphiaraus and Eriphyle of Argos. She married Thersander, son of Polynices, and bore Tisamenus, who succeeded to the Theban throne after the Trojan War generation — binding the Melampid house to the Epigon dynasty at the Cadmeia.
Adapted from Wikipedia, "Demonassa" · CC BY-SA 4.0
I.Family
Demonassa was daughter of Amphiaraus, king of Argos and the famous seer who marched with the Seven Against Thebes, and of Eriphyle. Through that parentage she was sister to Alcmaeon, Amphilochus, and other Amphiarids named in later catalogues. She married Thersander, son of Polynices, one of the Epigoni who reconquered Thebes, and by him she had a son Tisamenus.
Pausanias' Theban king-list places her at the close of the Cadmeian succession: after Thersander died in Mysia and Peneleos commanded the Boeotians at Troy in the young heir's stead, Eurypylus son of Telephus killed Peneleos, and Tisamenus — son of Thersander and of Demonassa, daughter of Amphiaraus — was raised to the throne.
II.Homonyms
This atlas entry (demonassa-amphiarid) is the Amphiarid queen of Thebes, wife of Thersander. Distinct from Demonassa wife of Adrastus and mother of Aegialeus (Hyginus), from Demonassa wife of Poeas and mother of Philoctetes, and from Demonassa mother of Eurydamas by Irus.