PROERNA(Πρόερνα), a town of Phthiotis, in Thessaly (Strab. 9. p. 434), which Stephanus B. writes Proarna (Προάρνα), and calls by mistake a town of the Malians. In B.C. 191 Proerna, which had been taken by Antiochus, was recovered by the consul Acilius. (Liv. 36.14.) We learn from this passage of Livy that Proerna stood between Pharsalus and Thaumaci, and it is accordingly placed by Leake at Ghynekókastro. ( Northern Greece, vol. 1. p. 459.)