'Heathrow' means the row of houses on the heath.
The hamlet lay along a country lane in the parish of Harmondsworth, facing the common land of Hounslow Heath. First recorded about 1410 as La Hetherewe, it is spelt 'Heathrow' from 1453. Its houses and farms were demolished in 1944 to build the new London Airport, which opened in 1946 and took the name Heathrow in the 1960s.