The patronymic "Pleisthenides" occurs in several ancient sources. Stesichorus uses it twice, probably referring to Menelaus, in one fragment (209 PMG), and Agamemnon, in another (219 PMG).Gantz, p. 553. Ibycus refers to Agamemnon as "the king Pleisthenides, leader of men, son of noble father Atreus" (282 PMG), which would seemingly make some Pleisthenes an ancestor of Atreus.See Gantz, p. 553, which says that "either the poet here heedlessly combines two conflicting descriptions (from different epic traditions?), or knows of a genealogy other than those we have found so far. Bacchylides, in the same poem, refers to Menelaus as both "Atreides" and "Pleisthenides".Gantz, p. 553; Bacchylides, 15.6, 48. Aeschylus's Agamemnon, refers to Agamemnon's family as the Pleisthenidae ("house of Pleisthenes"),Aeschylus, Agamemnon 1569. and the "race of Pleisthenes",Aeschylus, Agamemnon 1602. although exactly which branch of Agamemnon's family is meant is unclear.Gantz, p. 554. Both Weir Smyth, and Sommerstein in their notes to Agamemnon 1569, suggest that Pleisthenidae is being used here as a synonym of Atreidae.
The patronymic "Pleisthenides" occurs in several ancient sources Stesichorus uses it twice probably referring to Menelaus in one fragment (209 PMG) and Agamemnon in another (219 PMG)Gantz p 553 Ibycus refers to Agamemnon as "the king Pleisthenides leader of men son of noble father Atreus" (282 PMG) which would seemingly make some Pleisthenes an ancestor of AtreusSee Gantz p 553 which says that "either the poet here heedlessly combines two conflicting descriptions (from different epic traditions) or knows of a genealogy other than those we have found so far Bacchylides in the same poem refers to Menelaus as both "Atreides" and "Pleisthenides"Gantz p 553; Bacchylides 156 48 Aeschylus's Agamemnon refers to Agamemnon's family as the Pleisthenidae ("house of Pleisthenes")Aeschylus Agamemnon 1569 and the "race of Pleisthenes"Aeschylus Agamemnon 1602 although exactly which branch of Agamemnon's family is meant is unclearGantz p 554 Both Weir Smyth and Sommerstein in their notes to Agamemnon 1569 suggest that Pleisthenidae is being used here as a synonym of Atreidae