Ganapathi Agraharam Annadhurai Ayyar Natesan (25 August 1873 – 29 April 1948) was an Indian writer, journalist, publisher, politician and freedom-fighter from the erstwhile Madras Presidency.

He was the founder and proprietor of G. A. Natesan & Co. which published nationalist books, the most prominent among whom was The Indian Review.

He had his schooling in Kumbakonam[1] He graduated in arts from the Presidency College, Madras[2] and started a career as a publisher.

[4] Natesan advertised on the front page that his publication was "devoted to the discussion of all topics of interest".

[4] When Mahatma Gandhi visited Madras for the first time since his arrival in India in 1915, he stayed at Natesan's house at Thambu Chetty Street, Georgetown.