John Pennycuick (engineer)
Colonel John Pennycuick (15 January 1841 – 9 March 1911) was an Indian-born British Army engineer and civil servant who served as a member of the Madras Legislative Council. He undertook several irrigation works which included the masonry dam of Mullaperiyar on the Periyar River.
Source: Wikipedia — John Pennycuick (engineer) (CC BY-SA 4.0)