Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
YON
As described in historical dictionaries
Patronymica Britannica (1860)
DANDEL YON. Fr . Bent de lion, "lions tooth ;" probably from the formidable character of the first M'ho bore it. So CcEur do Lion, Front de Breuf, &c. This fixmily, of Norman origin, were great proprietors in the Isle of Thanet, and became extinct about the beginning of Edw. IV. See Lewis's Isle of Tenet, 1723,
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English