Source : Webster's Revised Unabridged Dictionary (1913)

Eudemonist \Eu*de"mon*ist\, Eudaemonist \Eu*d[ae]"mon*ist\, n.
   One who believes in eudemonism.

         I am too much of a eud[ae]monist; I hanker too much
         after a state of happiness both for myself and others.
                                                  --De Quincey.