name of a Roman gens.
— So esp., C. Laelius, a friend of Scipio Africanus: in quo Laeliu' clamores, σοφὸς ille, solebat Edere, Lucil. ap. Cic. de Fin. 2, 8, 24; cf.: nec dubitare illum (C. Laelium) in omni sermone appellare sapientem, Cic. Lael. 1, 1; id. Brut. 21, 82; cf. Hor. S. 2, 1, 65; 72. Cicero's treatise on Friendship is named after him.
— D. Laelius, a writer of moderate abilities, Lucil. ap. Cic. de Or. 2, 6, 25.
— Another D. Laelius, perh. a son of the preceding, an adherent of Pompey, Caes. B. C. 3, 40.
—In fem.: Laelia, ae, daughter of C. Laelius, and mother-in-law of L. Crassus, celebrated for her intellectual culiure, Cic. Brut. 58, 211.
—Another Laelia, a Vestal, Tac. A. 15, 22.
—Hence, Laeliā-nus, a, um, adj., of or belonging to a Laelius, Laelian: naves, i. e. of Pompey's commander, D. Laelius, Caes. B. C. 3, 100, 2.