MASTIA´NI(Μαστιανοί), a people on the south coast of Spain, east of the Pillars of Hercules, to whom the town of MASTIA(Μαστία) belonged. They were mentioned by Hecataeus (Steph. B. s. v. Μαστιανοί) and Polybius (Plb. 3.33), but do not occur in later writers. Hannibal transported a part of them to Africa. (Polyb. l. c.) Mastia appears to be the same as MASSIA(Μασσία), which Theopompus described as a district bordering upon the Tartessians. (Steph. B. s. v. Μασσία.) Hecataeus also assigned the following towns to this people: MAENOBORA(Steph. B. s. v. Μαινόβωρα), probably the same as the later Maenoba; SIXUS(Σίξος, Steph. B. s. v.), probably the same as the later Sex, or Hexi; MOLYBDANA(Μολυβδάνα, Steph. B. s. v.) ; and SYALIS(Σύαλις, , Steph. B. s. v.), probably the later Suel.