Stanley Johnson was born in 1940 in Penzance, Cornwall, the son of Osman Kemal (later known as Wilfred Johnson) and Irene Williams (daughter of Stanley Fred Williams of Bromley, Kent, and Marie Louise de Pfeffel).[3][4] His paternal grandfather, Ali Kemal Bey, one of the last interior ministers of the Ottoman Empire government, was assassinated in 1922 during the Turkish War of Independence. Stanley's father was born in 1909 in Bournemouth, and his birth was registered as Osman Ali Wilfred Kamal.[5] Osman's Anglo-Swiss mother Winifred Brun died shortly after giving birth.[6] Ali Kamal returned to Turkey in 1912, whereafter Osman Wilfred and his sister Selma were brought up by their English grandmother, Margaret Brun, and took her maiden name, Johnson, Stanley's father therefore becoming simply Wilfred Johnson.[7]
Johnson's maternal grandmother's parents were Hubert Freiherr von Pfeffel (born in Munich on 8 December 1843) and his wife Hélène Arnous-Rivière (born on 14 January 1862). Hubert von Pfeffel was the son of Karl Freiherr von Pfeffel (born in Dresden on 22 November 1811; died in Munich on 25 January 1890) by his marriage in Augsburg on 16 February 1836 to Karolina von Rothenburg (born in Frankfurt on 28 November 1805; died in Frankfurt on 13 February 1872), herself said to be the illegitimate daughter of Prince Paul of Württemberg by Friederike Porth.
Johnson attended Sherborne School, Dorset. While still an undergraduate reading Greats at Exeter College, Oxford, he took part in the Marco Polo Expedition with Tim Severin and Michael de Larrabeiti, travelling on a motorcycle and sidecar from Oxford to Venice and on to India and Afghanistan. The adventure led to the publication of Severin's 1964 book Tracking Marco Polo, with photographs by de Larrabeiti.
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