William Henry Smith, 3rd Viscount Hambleden (25 July 1903 – 31 March 1948), was a British peer and a descendant of the founders of stationery group W H Smith, who was chairman and owner of the firm from 1928 until his death.
Lord Hambleden was the 2nd child and eldest son of Frederick Smith and Esther Georgiana Caroline nee Gore (1870–1955), a daughter of Arthur Gore, 5th Earl of Arran.
Patricia, Viscountess Hambleden, was appointed Dame Commander of the Royal Victorian Order (DCVO), and, years later, to Dame Grand Cross of the Royal Victorian Order (GCVO).
The couple had five children:[citation needed] In 1961 his daughter, Katharine Smith, married the screenwriter Ivan Moffat, with whom she had two sons, Jonathan (born 1964) and Patrick Moffat (born 1968).
[citation needed] He succeeded to the title of Viscount Hambleden following his father's death in 1928.