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Thirumarugal Natesapillai Rajarathinam Pillai (27 August 1898 – 12 December 1956) or TNR was an Indian Carnatic musician, nadaswaram maestro, vocalist and film actor. He was popularly known as "Nadaswara Chakravarthi" (literally, the Emperor of Nadaswaram)he is also guru of Karukurichi Arunachalam