Iphianassa (daughter of Agamemnon)

'strong queen') is an obscure and controversial daughter of Agamemnon and Clytaemnestra, sister to Laodice[2] and Chrysothemis, sometimes considered identical to Iphigeneia.

[3] Extant plays by Sophocles, Aeschylus and Euripides on the tale of Orestes and Electra do not include her as a character.

On the other hand, Sophocles does mention her, and hints that she lives in the palace of Aegisthus and Clytemnestra, together with Electra and Chrysothemis.

[4] Lucretius, in De Rerum Natura, mentions Iphianassa being sacrificed by her father on the altar of the "Virgin of the Crossways" (Triviai virginis) Diana[5] at Aulis as an offering to ensure a successful voyage, in undoubted reference to the tradition of Iphigeneia.

Lucretius cited this episode to make the point: "Superstition (religio) was able to induce so great an evil.