Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
SAULL
As described in historical dictionaries
Patronymica Britannica (1860)
SAULL. SAUL. See Sale. An undertenant, Saul, is however mentioned in Domesday, and Saul is a parish in co. Gloucester.