"[Damarla] Venkatapathy sought access to British trade partners, and so granted to the company’s representatives a fishing village, Madraspatnam and surrounding territory. The Fort, built south of Madraspatnam, came to be known to Indians as Chennapatnam, after Venkatapathy’s father, either in deference to the wishes of Damarla Venkatapathy or the site originally bore that name. Chennai Corporation accounts for the use of the name “Madras” over the prior 350 years as the product of “confusion” asserting that the original place names were inexplicably reversed, with Chennai taken to refer to the fishing village and Madras to the fort and environs and that, as a result, historians drew the erroneous conclusion that Madras was the more accurate name."
January 1, 1970
https://en.wikiquote.org/wiki/Chennai