The Collaborative International Dictionary of English v.0.48:

Foy \Foy\ (foi), n. [F. foi, old spelling foy, faith. See
   Faith.]
   1. Faith; allegiance; fealty. [Obs.] --Spenser.
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   2. A feast given by one about to leave a place. [Obs.]
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            He did at the Dog give me, and some other friends of
            his, his foy, he being to set sail to-day. --Pepys.
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