Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
SARASIN
As described in historical dictionaries
Patronymica Britannica (1860)
SARASIN. A Saracen — probably one who had embraced Christianity during the Crusades, and settled in Western Europe. It may be mentioned, that Saladin was an English surname, temp. Edward I. H.R.