William George Arthur Ormsby-Gore, 4th Baron Harlech, KG, GCMG, PC (11 April 1885 – 14 February 1964), was a British Conservative politician and banker.

[4] He was mobilized at the outbreak of the First World War and accompanied his regiment to Egypt, where he was promoted captain in 1915 and went onto the general staff.

[5] In 1916 he joined the Arab Bureau as an intelligence officer, attached to the British High Commissioner Sir Henry A.

[6][7] He strongly opposed the secret Sykes-Picot Treaty, arguing "we make professions of defending and helping small & oppressed nations... [yet] we parcel out between our allies & ourselves vast tracts of countries which do not want us.

Zionist leader Chaim Weizmann, a personal friend, took refuge in Ormsby-Gore's London home while the former was in the capital for the cabinet approval of the Balfour Declaration.

With Weizmann's approval, Ormsby-Gore was the British military liaison officer with the Zionist mission in the Holy Land (then lately liberated from Ottoman Turkish rule) during March to August 1918.

[citation needed] He had an extensive library at his Shropshire home, Brogyntyn near Oswestry, which he downsized after moving out of the mansion in 1955.

They had six children: Lord Harlech died in February 1964,[1] aged 78, and was succeeded in the barony by his second, but eldest surviving son David, who followed him into politics and served as British Ambassador to the United States in the 1960s.