(Δημοδάμας), of Miletus or Halicarnassus, is called Seleuci et Antiochi dux by Pliny. (H. N. 6.16.) He appears to have written a geographical work on Asia, from which Pliny derived great assistance. He is mentioned also by Stephanus Byzantius (s. v. Ἄντισσα), and is probably the same as the Demodamas who according to Athenaeus (xv. p. 682) wrote a work on Halicarnassus. (περὶ Ἁλικακαρνασσοῦ.)
[L.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