Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
TRENCHARD
As described in historical dictionaries
Patronymica Britannica (1860)
TRENCHARD. Baldwin de Riparils, Earl of Devon, granted Ilordhill, in the Isle of AVight, to the ancestor of this family, Paganus Trenchard, temp. Henry I. The name is most probably derived from the O. Fr. trencher, to carve ; and it may refer to the occupation of the original bearer, either as a carver of viands, or as owner of a trenchant blade in war.
Surname type: Occupational name
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English