Sir William Henry Hadow CBE (27 December 1859 – 8 April 1937) was a leading educational reformer in Great Britain, a musicologist and a composer.

Born at Ebrington in Gloucestershire and baptised there on 29 January 1860 by his father, he was the eldest child of the Reverend William Elliot Hadow (1826–1906) and his wife Mary Lang Cornish (1835–1917).

The results were published as a book, "New Ventures in Broadcasting - A Study in Adult Education".

He took on the general editorship of the original six-volume edition of the Oxford History of Music between 1901 and 1905, writing the fifth volume (covering the period from C.P.E.

[7] With his younger sister Grace Hadow he edited The Oxford Treasury of English Literature (1907–8).