A. K. Martyn) (1903–1984), was an English schoolmaster, scholar, academic and a distinguished British Himalayan mountaineer.

[1][2] Martyn had previously taught at Harrow School in England for ten years before he moved to India.

[4] Martyn was at Doon for 31 years, thus becoming one of the longest-serving schoolmasters in the school's history.

Apart from teaching, Martyn was very keen on mountaineering, and was part of the expedition team to Trisul with pioneers like Jack Gibson, Gurdial Singh and Nandu Jayal.

[8] Martyn was appointed an Officer of the Order of the British Empire by Queen Elizabeth II in 1958, and in 1983 Padma Shri, the fourth-highest civilian award in India, from the Government of India for his notable contributions to the establishment of the Doon School.