Derbe in Fausset's Bible Dictionary

Near Lystra, E. of the upland plain of Lycaonia, stretching eastwards along the N. of the Taurus range. Probably near the pass ("the Cilician gates") from the plain of Cilicia up to the table land of the interior. Paul fled there from Iconium and Lystra (Acts 14:6; Acts 14:20-21; Acts 16:1). In enumerating places (2 Timothy 3:11) he mentions Lystra but not Derbe, though in the independent history they are mentioned together: a delicate instance of accuracy, for he is here enumerating only those places where he suffered persecution. Gaius or Caius belonged to Derbe, Paul's companion in travel (Acts 20:4). Identified by Hamilton (Researches in Asia Minor, 2:313) with Dirle, near the roots of Taurus near lake Ak-gol.