Trevithick is a Cornish surname. Notable people with the surname include:Francis Trevithick (1812–1877), British locomotive engineer Jeremy Trevithick, Spanish rugby union player Jonathan Trevethick (1864–1939), New Zealand politician Matthew Trevithick, American student, writer and researcher Paul Trevithick, American inventor, engineer and entrepreneur Richard Trevithick (1771–1833), British inventor, mining engineer and locomotive engineer William Edward Trevithick (1899–1958), Irish botanical illustrator