(Δόπιλλος) or DORIALLUS (Δοπίαλλος), an Athenian tragic poet, who was ridiculed by Aristophanes. Nothing more is known of him. (Suid., Hesych., and Etym. Mag. s. v. Δορ́ίαλλος; Aristoph. Lemn. Fr. 336, Dindorf, Schol. in Aristoph. Ran. 5.519; Fabric. Bibl. Graec. ii. p. 297.)
[P.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890