Trethowan

Trethowan is a Cornish surname, found both in Cornwall and amongst members of the Cornish diaspora. People with the name include:


 * Anthony Trethowan (1945–2015), Australian politician
 * Arthur Trethowan (1863–1937), Australian politician
 * Ian Trethowan (1922–1990), British television executive
 * Illtyd Trethowan (1907–1993), British religious philosopher
 * John Trethowan (born 1936), Australian rules footballer
 * Pat Trethowan (born 1941), Australian rules footballer
 * Rebecca Trethowan (born 1985), New Zealand rugby union player
 * Perry Trethowan, a fictional detective in a series of books by Robert Barnard
 * Sir William Trethowan  British professor of psychiatry, Birmingham University