LSJ
(< πύλαι), αἱ, one of the gates of Thebes, called from Proetus son of Thersander, A. Th. 377 (cf. 395).
the daughters of Proetus son of Abas, title of work by Theoc., Suid. = χάριτες, Hsch. (s.v.l.).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)