From this place was denominated an old family of gentlemen surnamed De Austell, of which family William de Austell was Sheriff of Cornwall 25 Henry VI. as also of Somerset and Dorset 27 and 28 of King Henry VI.; who gave for his arms, Argent, a saltire raguled Vert, but in what families the name, blood, and estate of those gentlemen are terminated I know not, or where they dwelt. At the town of St. Austell, alias Trenance, is weekly held upon Friday a considerable market, wherein is vended all commodities necessary for the life of man at a reasonable price.[11] Its also privileged 10th fairs or greater marts, on the 30th of November, Palm Sunday, and Thursday after Whitsunday, which benefits were doubtless first obtained from the Earls of Cornwall, by the Priors of Tywardreth aforesaid. Treverbyn, alias Tre-verbin, in this parish, was the voke lands of considerable manor long before the Norman Conquest, as appears from the Domesday tax aforesaid (it signifies in Cornish the herb, rape, root, or navew town, famous it seems in former ages for those vegetables,) from which place was denominated that old and knightly family of the Treverbins (who had there free chapel and burying place here lately extant), and of public use before the Church of St. Austell was erected; of which house was Walter Treverbyn, Sheriff of Cornwall 1223, the successor of Reginald de Valletort 7 Henry III. who had issue Sir Walter Treverbyn, Knight, who had a daughter married, named Katherine, to Peter Prideaux, of Boswithgye in Luxsillian 10th Edward II. From this Walter also lineally descended Sir Hugh Treverbyn, Knight, tempore Henry VI. whose two daughters and heirs were married to Edward Courtenay, of Boconnock or Haccomb, in Devon, and Trevannion, of Caryhays, in whom the name, blood, and estate of those Treverbins ended. But Henry Courtenay, Marquess of Exon, and Earl of Devon, forfeited one moiety of those lands to the Crown by attainder of treason against that butcher of the branches of the house of York, Henry VIII.; so that the same is now in copartnery between the King of England and Trevanion.