 She is the younger sister of Boris Johnson, the Prime Minister of the United Kingdom of Great Britain and Northern Ireland and Conservative MP for Uxbridge and South Ruislip; and the elder sister of Jo Johnson, Conservative MP for Orpington.On her father's side, Johnson is a great-granddaughter of Ali Kemal, a liberal Circassian-Turkish journalist and the interior minister in the government of Damat Ferid Pasha, Grand Vizier of the Ottoman Empire, who was murdered during the Turkish War of Independence in 1922.During the First World War, her grandfather and great-aunt were recognised as British subjects and took their grandmother's maiden name of Johnson.