nuncio

Etymology

From Spanish nuncio, from Latin nūntius (“envoy”).

noun

1. (Roman Catholicism) The ecclesiastic title of a permanent diplomatic representative of the Roman Catholic Church to a sovereign state or international organization, who is accorded a rank equivalent to an accredited ambassador, and may also be given additional privileges including recognition as Dean in a country's diplomatic corps.
2. (by extension) One who bears a message; a messenger.
   Altho at this distance you had no early Account or Particular of his Death; yet your Affection may cease to wonder that you had not some secret Sense or Intimation thereof by Dreams, thoughtful Whisperings, Mercurisms, Airy Nuncio’s, or sympathetical Insinuations, which many seem to have had at the Death of their dearest Friends. 1672, Thomas Browne, A Letter to a Friend, § 2
3. (historical) Any member of any Sejm of the Kingdom of Poland, Polish–Lithuanian Commonwealth, Galicia (of the Austrian Partition), Duchy of Warsaw, Congress Poland, or Grand Duchy of Posen.