S. Ramaseshan

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Sivaraj Ramaseshan
Born	(1923-10-10)10 October 1923 Madras, Madras Presidency, British India (now Chennai, Tamil Nadu, India)
Died	29 December 2003(2003-12-29) (aged 80) Bangalore (now Bengaluru), Karnataka, India
Nationality	Indian
Parents	Sivaramakrishnan [d] (father) Sitalaxmi [d] (mother)
Relatives	C.V. Raman (uncle) S. Pancharatnam (brother) Sivaramakrishna Chandrasekhar (brother)
Awards	Padma Bhushan
Scientific career
Fields	Physics
Institutions	Indian Institute of Science Indian Institute of Technology
Doctoral advisor	C.V. Raman
Doctoral students	Rajaram Nityananda

Sivaraj Ramseshan (10 October 1923 – 29 December 2003) was an Indian scientist known for his work in the field of crystallography. Ramaseshan served as director of the Indian Institute of Science and was awarded the Padma Bhushan. Ramaseshan is the nephew of Indian scientist and Nobel laureate Sir C. V. Raman and cousin of Subramanyan Chandrasekhar.