Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
GRENVILLE
As described in historical dictionaries
Patronymica Britannica (1860)
GRENVILLE. The Grenvilles of Wootton, CO. Bucks, descend from Eichard de Grenville, who came in with the Conqueror in the train of Walter Giflard, earl of Lougueville and Buckingham, whose son in law he was. The name, which has been variously written, Greynevile, Greinville, Granville, &c., and latinized De Granavilla, was doul:>tless borrowed from Granville, the well-known seajiort of Lower Normandy. The Grenvilles of the West are of the same stock. George G. of Stowe, in Cornwall, the poetical Lord Lansdowne, writing in 1711 to his nephew, Wm. Henry, Earl of Bath, says : " Your ancestors for at least five hundi-ed years never made any alliances, male or female, out of the western counties : thus there is hardly a gentleman either in Cornwall or Devon, but has some of your blood, as you of theirs." Quart. Eev. V. CIL p. 297. The G.'s of the Buckinghamshire Stowe could boast of a still longer territorial stability.