Daniel Joseph Jaffé (born on 2 November 1876 in London and died 11 June 1921 in Croydon, England) was a civil engineer and the younger son of Martin Jaffé and grandson of Sir Otto Jaffé. Jaffe Road, a street in Wan Chai and Causeway Bay, Hong Kong was named after him.
Daniel Jaffé was educated at City & Guilds Westminster - diploma of associate (A.C.G.I). In 1896 articled for 3 years as civil engineer to Sir James Mansergh F.R.S, who was famous as a waterworks consulting engineer.
Part of time spent on Elan Valley Aqueduct, later assistant to one of the resident engineers up to December 1901. On January 14, 1902, he became associate member of the Institute of Civil Engineers (A.M.I.C.E.). Later that year, he went to Hong Kong as Assistant Engineer in Public Works Department. In 1904 he became Acting Executive Engineer and from January 1906 was Executive Engineer.
He was responsible for Tytam (also spelled Tai Tam) waterworks with intermediate dam, later the 2nd section of the Tytam Tuk with the construction of the then-largest dam in the Far East, which was officially opened by Sir Henry May in February 1918. He was also responsible for the typhoon shelter at Mong Kok Tsui.
He went home on leave in 1918, suffering from sprue and inflammation of the liver, and was invalided out of the Colonial Service in autumn 1919. He spent considerable time in Eversleigh Hospital for Tropical Diseases suffering from pernicious anaemia. Jaffe died in Croydon in 1922.