The epic poem of Virgil, (in twelve books). So called from Æneas and the suffix -is, plur. -ides (belonging to).
“The story of Sinon,” says Macrobius, “and the taking of Troy is borrowed from Pisander. The loves of Dido and Æneas are taken from those of Medea and Jason, in Apollonius of Rhodes. The story of the Wooden Horse and burning of Troy is from Arctinus of Miletus.”
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894