Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
TREMAINE
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Local Cor. Br.) The town on the shore or sea-coast, from Tre, a town, and mayne--the stone town, the river or passage town.
Surname type: Location or geographical feature
Origin: Anglo-Saxon
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English