Question

Who renamed madras presidigy into tamilnadu

Answer 1

 The Madras Presidency, after Indian Independence,  became the Madras Province on 15 August 1947. On 26 Jan 1950 it was formed as Madras State by the Government of India. As a result of the 1956 States Reorganisation Act, the state's boundaries were re-organised. The state was finally renamed Tamil Nadu on 14 January 1969. It was Annadurai's government that renamed the Madras State to Tamil Nadu. 

Answer 2

CN Annadurai the Chief Minister renamed Madras state as Tamilnadu.