Trefethen

Trefethen is a surname. Notable people with the surname include:


 * Anne Trefethen, British computer scientist, former wife of Lloyd N.
 * Florence Newman Trefethen (1921–2012), American codebreaker, poet, and English professor, wife of Lloyd M. and mother of Lloyd N.
 * Lloyd M. Trefethen (1919–2001), American fluid dynamics researcher, husband of Florence and father of Lloyd N.
 * Lloyd N. Trefethen (born 1955), British mathematician, son of Florence and Lloyd M., former husband of Anne