Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
MOYLE
As described in historical dictionaries
Patronymica Britannica (1860)
MOYLE. Not from mule, as the family apiear to have imagined when they assumed for arms, ' Gules, a movie or mule passant Argent ;' but from a jjlace in or contiguous to the parish of St. Minvor, co. Cornwall. D. Gilbert's Cornwall, ii. 67.
Origin: Anglo-Saxon
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English