Arruntĭus, ii, m., a Roman nomen. 
- I.  L. Arruntius, consul A.U.C. 759, Tac. A. 1, 13; 3, 11; 6, 5; prob. the same as the historian L. Arruntius, who composed a work on the Punic Wars, Sen. Ep. 114, 17 sqq.
- II.  Arruntius, a celebrated artist under Claudius Cœsar, Plin. 29, 1, 5, § 7.
- III.  Arruntius Stella, a poet, Stat. S. 1, 2; Mart. 6, 21.
- IV.  Arruntius Caelius, a Latin grammarian, Diom. I. p. 307 P.; Prisc. III. p. 607 P.