Lewis & Short

Pălaestīnă (Pălest-), ae, and Pă-laestīnē, ēs, f., = Παλαιστίνη, the country of Palestine, in Syria, Mel. 1, 11, 2; Plin. 5, 12, 13, § 66 sq.
Hence,

  1. A. Pă-laestīnus, a, um, adj., of or belonging to Palestine: aqua, the Euphrates, Ov. F. 2, 464: Syrus, Tib. 1, 8, 17 (7, 18): Palaestini simul Hebraeique liquores, Stat. S. 5, 1, 213.
    In plur.: Pălaestīni, ōrum, m., the inhabitants of Palestine, Ov. M. 4, 46; Hier. in Isa. 14, 29; the Philistines, Vulg. Gen. 21, 33.
  2. B. Pălaestīnensis, e, adj., Palestinian, Spart. Sev. 9.