Trethewey (surname)

Trethewey is a surname of Cornish origin. It is derived from any of the various settlements in Cornwall called Trethewey.

Notable people with the surname include:


 * Fred Trethewey (born 1949), British archdeacon
 * Natasha Trethewey (born 1966), American poet
 * Richard Trethewey (born c. 1955), American plumber and television personality
 * Robert Trethewey (1902–1989), Australian politician
 * Tom Trethewey (born 1944), American swimmer
 * William Griffith Trethewey (1865–1926), Canadian inventor, prospector and farmer
 * William Trethewey (1892–1956), New Zealand sculptor and monumental mason