The Collaborative International Dictionary of English v.0.48:

Proxene \Prox"ene\, n. [Cf. ?; ? before + ? a guest, stranger:
   cf. F. prox[`e]ne.] (Gr. Antiq.)
   An officer who had the charge of showing hospitality to those
   who came from a friendly city or state.
   [1913 Webster]