Lewis & Short

2. Hortensĭus (HORTÉSIVS, Inscr. Fabr. p. 235, n. 619),

  1. I. the name of a Roman gens; so, in partic.: Q. Hortensius Hortalus, a celebrated orator in the time of Cicero, Cic. Brut. 88, 301 sq.; Quint. 11, 3, 8; 12, 11, 27; Gell. 1, 5, 2; Tac. A. 2, 37. After him is named the treatise of Cicero entitled Hortensius, of which fragments remain (Bait. XI. 55 sqq.).
    Hortensĭa, ae, f., his daughter, also celebrated for her skill in oratory, Val. Max. 8, 3, 3; cf. Quint. 1, 1, 6.
  2. II. Derivv.
    1. A. Hortensĭus, a, um, adj., of or belonging to a Hortensius, Hortensian: lex, of the dictator Q. Hortensius, Gai. Inst. 1, 3; Dig. 1, 2, 2; cf. Plin. 16, 10, 15, § 37; Gell. 15, 27, 4.
      Another lex Hortensia (ut nundinae essent fastae), perh. of the same Hortensius, Macr. S. 1, 16.
    2. B. Hortensĭānus, a, um, adj., Hortensian: eloquentia, Val. Max. 8, 3, 3: quod me admones, ut scribam illa Hortensiana, i. e. the treatise entitled Hortensius, Cic. Att. 4, 6, 3: in aedibus Hortensianis, Suet. Aug. 72.