Noy is an abbreviation for Noah. "In England, in the seventeenth century, Attorney-General Noy was succeeded by Sir John Banks, and Chief-justice Heath being found guilty of bribery, Sir John Finch obtained the office; hence it was said: "Noy's flood is gone, The Banks appear, Heath is shorn down, And Finch sings here."--Lower. In the Cornish British, Noi is a nephew, and Noys night.

Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.

NOYES. The family of Noyes of Wiltshire and Sussex have, time out of mind, borne the same arms as that of Noye of Cornwall, to Avhich the celebrated attorneygeneral of Chai'Ies I. belonged. There is a tradition that three brothers of the name came over from Normandy about the time of the Conquest, and settled in the counties of Wilts, Hants, and Cornwall. The name is supposed to be derived from Noye or Noyon in Normandy, anciently called Noyon-sur-Andelle, but now Charleval, in the canton of Grainville ; but there are several localities in that province called Noyers, which may have an equal claim. The various spellings of the name are Noye, De Noye, De la Noye, Noise, Noys, Noyse. Inf. T. Herbert Noyes, Esq., junr.

Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.