More Trelawny's

Bishop Sir Jonathon Trelawny (1650 - 1721) is the subject of the Cornish "anthem" Trelawny, but there are other famous Trelawnys:

Edward John Trelawny (1792 - 1881) writer; friend of Shelly and biographer of Lord Byron

Trelawny Parish in Jamaica

Trelawny - book by R. Glynn Grylls

And more recently:

Trelawny of the Wells - a play by  Arthur Wing Pinero (1972)

Trelawny Lawn - rock song by Marc Bolan and T. Rex (1970's)

Professor Sybil Trelawny - a character in the Harry Potter series (1990's)