Lewis & Short

Ŏtho, ōnis, m., = Ὄθων, a Roman surname.

  1. I. L. Roscius Otho, a knight, a friend of Cicero, and author of the law that the knights should occupy the first fourteen seats in the theatre next to the orchestra, Cic. Mur. 19, 40; cf. Ascon. ad Cornel. p. 79 Orell.
    Hence, sic libitum vano, qui nos distinxit, Othoni, Juv. 3, 159.
  2. II. M. Salvius Otho, a Roman emperor, whose biography is given by Suetonius: mollis Otho, Mart. 6, 32, 2; Juv. 2, 99.
    Hence,
    1. B. Ŏthōnĭānus, a, um, adj., of or belonging to the emperor Otho, Othonian: Othoniani duces, of the emperor Otho, Tac. H. 2, 24: partes, id. ib. 2, 33.