Rēgillus, i, m.
I A town of the Sabines , whence Appius Claudius emigrated to Rome , Liv. 2, 16 Drak.; also called Rēgilli , ōrum, m., Suet. Tib. 1.— Hence, Rēgillānus , a, um, and Rēgillensis , e, adj., of or belonging to Regillus : Claudius Appius Regillanus, Suet. Tib. 2: Claudius Regillensis, Liv. 8, 15.—
II A small lake in Latium (the mod. Cornufelle ), celebrated for the victory over the Latins gained there by the Romans under the dictator Postumius , Cic. N. D. 3, 5, 11; called also lacus Regillus, Liv. 2, 19; Plin. 33, 2, 11, § 38; and Regilli lacus, Flor. 1, 11, 2; Aur. Vict. Vir. Ill. 16.— Hence, Rēgillensis , surname of the Postumii: M. Postumio Regillensi, Liv. 4, 49, 7: A. et L. Postumii Regillenses, id. 6, 22, 5.—
III A Roman surname in the Aemilian gens, Cic. Att. 12, 24, 2: M. Aemilius Regillus, Liv. 24, 7 fin. ; 8; 29, 11 fin. ; 38.