Lewis & Short

Ălānus, a, um, adj., of or pertaining to the Alani, = Ἀλανοί, a very warlike Scythian nation upon the Tanais and Palus Mœotis: gens Alana, Claud. B. Get. 583.
Subst.: Ălānus, i, m., one of the Alani, Luc. 10, 454.
Com. plur.: Ălāni, ōrum, the Alani, Plin. 4, 12, 25, § 80; Sen. Thyest. 629; Luc. 8, 223; Val. Fl. 642.