Percy \p(e)-rcy, per-cy\ as a boy's name is pronounced PER-see. It is of Latin origin. A British aristocratic surname derived from Persius, a Latin version of a name used among the ancient Gauls. Persius possibly means "to penetrate the hedge" as reference to an effective hunter, in Old French. See also Percival. Author Walker Percy; poet Percy Bysshe Shelley.