Lewis & Short

Eudaemon, ŏnis, com., = Εὐδαίμων (fortunate), the Greek appellation of the southern part of Arabia (Arabia Felix), Mel. 3, 8, 6; Plin. 6, 27, 31, § 138; Sol. 33, 4; and of its inhabitants, Vop. Aurel. 33; Capitol. Macr. 12.