Thelwell is both a surname and a given name. Notable people with the name include:
Surname: Alton Thelwell (born 1980), English footballer Kevin Thelwell (born 1973), English football coach Lumley Thelwell (fl. 1649–1656), Welsh politician Michael Thelwell (born 1939), Jamaican-born American novelist and civil rights activist Norman Thelwell (1923–2004), English cartoonist Ryan Thelwell (born 1973), Canadian football player
Given name: Thelwell Pike (1866–1957), English footballer
See also Thelwall Thirlwall