Átrida. Patronymic adj.. Descendant of Atreus - mythological king of Mycenae, son of Pélope and Theobula-mainly by the lines of his sons, Agamemnon and Menelaus: the átridas. Thyestes, brother of Atreus, seduced the wife of Pleisthenes ( another son of Atreus, who had educated ) and sent him against his father. Atreus, ignorant of who was executed. Upon hearing of this, in the banquet food served Tiestes the bodies of two of his own sons ( his brother ). Another son of Thyestes, Aegisthus then sacrificed to Atreus. This history of the átrida family inspired some momentous Greek tragedies: Orestiada - Aeschylus-Electra - Sófocles-Orestes - by Euripides. ( Information taken from "The great world encyclopedia". Bilbao, Spain )