What is "treffry"

Treffry is an Cornish surname. The first record of the name Treffry was found in Cornwall where they were anciently seated as Lords of the Manor of Treffry, some say, at the time of the taking of the Domesday Book survey in 1086. The first on record was Roger Treffry about the year 1200 and 11th in descent from him in the main line was John Treffry, living in 1620.