Lewis & Short

Pisaurum, i, n.. a city of Umbria, at the mouth of the Pisaurus, the mod. Pesaro, Mel. 2, 4, 5; Liv. 39, 44; Vell. 1, 15, 2; Caes. B. C. 1, 11 sq.; Cic. Fam. 16, 12, 2; id. Att. 2, 7, 2 sq.
Hence,

  1. A. Pisaurensis, e, adj., Pisaurian: T. Accius Pisaurensis, of Pisaurum, Cic. Brut. 78, 271; Plin. 7, 39, 40, § 128.
    In plur.: Pisaurenses, ĭum, m., the Pisaurians, Inscr. Grut. 276, 3; 481, 9; 1085, 12.
  2. B. ‡ Pisaurĭus, ii, m., name of a slave liberated by the city of Pisaurum, Inscr. Fabr. p. 438, n. 17.