paranymph

noun2

1. •
   (no longer used) A friend of the bridegroom; a best man; a bridesmaid.

   • Thy Paranymph, worthless to thee compar'd, […] — 1671
2. •
   (no longer used) An ally or spokesman; someone who speaks in support of someone else.

   • But it is the basest of all when lust is the paranymph, and solicits the suit, and makes the contract, and joins the hands; […] — 1653