E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Troilus (3 syl.).
The prince of chivalry, one of the sons of Priam, killed by Achilles in the siege of Troy (Homers Iliad). The loves of Troilus and Cressida, celebrated by Shakespeare
and Chaucer, form no part of the old classic tale.
As true as Troilus. Troilus is meant by Shakespeare to be the type of constancy, and Cressid the type of female inconstancy. (See CRESSIDA.)