Lewis & Short

Longĭmănus, i, m. [longus-manus, long-hand, i. e. that has an uncommonly long forearm], a surname of Artaxerxes, king of Persia; a transl. of the Gr. Μακρόχειρ, Hier. in Chron. Euseb. ad Olymp. LXXIX.; v. Macrochir.