Khan Bahadur Sir Mohammad Usman was an Indian politician, hakim and socialite who served as the Minister of Home for the Madras Presidency in the Justice Party government of the Raja of Bobbili and as the first Indian acting Governor of Madras from 16 May 1934 to 16 August 1934. His name is often written Muhammad Usman.

Thyagaraya Nagar, commonly known as T. Nagar, and historically known as East Mambalam, is a very affluent commercial and residential neighbourhood in Chennai, Tamil Nadu, India. It is surrounded by Nungambakkam in the North, Teynampet in the East, Nandanam in the South-East, C.I.T. Nagar in the South and West Mambalam and Kodambakkam in the West. The stretch between Duraiswamy Road and T. Nagar Bus Stand has some of the costliest real estates in Chennai. It was constructed between 1923 and 1925 by the Madras Presidency government of the Raja of Panagal as a part of town planning activities initiated according to the Madras Town Planning Act of 1920. The town was named after P. Thyagaraya Chetty. The streets, parks and localities in the new neighbourhood were named after important officials in the provincial government.