The Collaborative International Dictionary of English v.0.48:
Eudemon \Eu*de"mon\, Eudaemon \Eu*d[ae]"mon\, n. [Gr. e'y^ well, good + ? one's demon.] A good angel. --Southey. EudemonicsWordNet (r) 3.0 (2006):
eudemon n 1: a benevolent spirit [syn: eudemon, eudaemon, good spirit] [ant: cacodaemon, cacodemon]