Lieutenant Colonel Harold Fenton Jacob (1866–1936) was the British Political Agent at Dthala between 1904 and 1907, and then served as First Assistant Resident in Aden between 1910 and 1917. After the outbreak of the First World War he also acted as Chief Political Officer to the Aden Field Force. From 1917–1920 he was advisor on South Western Arabian Affairs to the British High Commissioner in Egypt.