Lewis & Short

Ŏlynthus or -os, 1, f., = Ὄλυνθος,

  1. I. a city of Thrace, on the borders of Macedonia, now Agia Maria, or Aio Mamas, Mel. 2, 2, 9; Plin. 4, 11, 18, § 42; Nep. Pel. 1, 2; Juv. 12, 47.
    Hence,
  2. II. Olynthius, a, um, adj., of Olynthus, Olynthian, Curt. 8, 8, 19.
    Subst.
    1. A. Olynthĭa, ae, f., the region about Olynthus, Varr. R. R. 1, 44.
    2. B. Olynthius, ii, m., an Olynthian, Sen. Contr. 5, 10, 34.
      Usually in plur.: Olyn-thii, ōrum, m., the inhabitants of Olynthus, the Olynthians, Nep. Timoth. 1, 2; Just. 8, 3, 10; 7, 4, 6.