Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
SANDILANDS
As described in historical dictionaries
Patronymica Britannica (1860)
SANDILANDS. The surname of Lord Torpichen is traced to Sir James Sandilands, who flourished in the reign of King David II. The name is clearly local, but I do not find the place.