No it is actually a Norman name. Percy comes from an English surname which was derived from the Normal town 'Perci'. It's been suggested that 'Perci' could be from the Gaulish personal name which is latinized as 'Persius'.
Percy French died in 1920.
Percy French was born in 1854.
Percy William French has written: 'Partnership law'
Percy Rodrigues's birth name is Percy Rodrigues.
In fact, Percy Weasley is Percy Weasley's real name.
Percy Crosby's birth name is Crosby, Percy Leo.
Percy Saltzman's birth name is Percy P. Saltzman.
Percy Sutton's birth name is Percy Ellis Sutton.
Percy Standing's birth name is Percy Archibald Standing.
Percy Aires's birth name is Percy Aires Loesh.
Percy Ames's birth name is Percy Freeman Ames.
Percy Barbat's birth name is Percy Dewitt Barbat.