Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
RASHLEIGH
As described in historical dictionaries
Patronymica Britannica (1860)
RASHLEIGH. "Rashlcigh in the parish of Wemwortliy, in Devonshire, gave name to this ancient family, the elder line