Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
NORVAL
As described in historical dictionaries
Patronymica Britannica (1860)
NORVEL. NORVAL. Nisbet says, " of that Ilk." It clearly appears, then, that there have been young men who could with truth affirm — " My name is Norval ;" but whether they were sons of Grampian shepherds or not, neither the old heraldrist, nor tlie gazetteer infomis us.