Sir Alexander Blackie William Kennedy FRS, FRGS (17 March 1847 – 1 November 1928), better known simply as Alexander Kennedy, was a leading British civil and electrical engineer and academic. A member of many institutions and the recipient of three honorary doctorates, Kennedy was also an avid mountaineer and a keen amateur photographer being one of the first to document the archaeological site of Petra in Jordan following the collapse of the Ottoman Empire.