Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
MEDLAR
As described in historical dictionaries
Patronymica Britannica (1860)
MEDLAR. \Ir. Ferguson thinks that this name corresponds to the Germ, family name Madler, which is probably identical with the 0. Germ. Madalhari ; but the occurrence in H.R. of one Kich. le Medler rather tends to shew that the name was originally applied to some medieval busybody.