Tags: Name, Surname.
Trewartha and Andrewartha is a Cornish family name (and placename Dexter).According to the Handbook of Cornish Names by G Pawsley White Trewartha is a Cornish name meaning Upper Farm or Upper Homestead.CORNISH NAMES by Dr T. F. G. Dexter : Royal Institution of Cornwall : pub 1926 Longmans Green : reprinted 1968 Bradford Barton : says on p15 – Nouns: tre a town feminine (maybe a hamlet or house also Brythonic Celt Welsh tref about 4-500AD).