Source : Webster's Revised Unabridged Dictionary (1913)

Foy \Foy\, n. [F. foi, old spelling foy, faith. See {Faith}.]
   1. Faith; allegiance; fealty. [Obs.] --Spenser.

   2. A feast given by one about to leave a place. [Obs.]

            He did at the Dog give me, and some other friends of
            his, his foy, he being to set sail to-day. --Pepys.