From Citizendium, the Citizens' Compendium
Aigisthos : Cousin of Agamemnon and Menelaos who seduces the queen Clytemnestra while her husband Agamemnon is away fighting the Trojan War in Asia Minor. When Agamemnon returns, he murders the returning king, but he is later murdered, in turn, by Agamemnon's son Orestes, and this story is frequently cited in the Odyssey as a contrasting situation to the family situation of Odysseus. Source: Elizabeth Vandiver, Classics scholar, authority on Greek mythology as well as Greek tragedy, the Iliad, Odyssey, Aeneid, Homer, and Virgil. This definition is based on her course Classical Mythology for The Teaching Company.
This article contains just a definition and optionally other subpages (such as a list of related articles), but no metadata. if you want to expand this into a full article.