List from Wikipedia
Spiritual leaders
Agnihotram Ramanuja Tatachariar (1907–2008) - Vedic scholar.
Chinna Jeeyar Swamy
Manavala Mamuni
Nathamuni
Pillai Lokacharya
Vedanta Desika
Yamunacharya
Swami Parthasarathy
Alasinga Perumal - Inspired Vedanta Kesari.
Journalism
Gopalan Kasturi- Former Editor of The Hindu from 1965 to 1991.[1]
Kasturi Ranga Iyengar(1859–1925)- Indian journalist. Former Managing-director of The Hindu from 1909 to 1925.
Siddharth Varadarajan- Current editor of The Hindu.[2]
Tunku Varadarajan-New York-based journalist and editor of Newsweek International.
N. Ram- Former Managing-Director of The Hindu and recipent of Padma Bhushan.
N. Ravi- Former Editor-in-chief of The Hindu from 1991 to 2003.
Sreenath Sreenivasan- Technology journalist based in New York City.
Diplomats, bureaucrats, administrators and politicians
K. Subrahmanyam- Prominent international strategic affairs analyst, journalist and former Indian civil servant
Vimala Rangachar, President of MES Institutions, Bangalore, Founder of Crafts Council of Karnataka,
T. S. S. Rajan (1880–1953), Indian politician and freedom-fighter. Member of the Imperial Legislative Council (1934–1936), Minister of Public Health and Religious Endowments (Madras Presidency) (1937–1939), Minister of Food and Public Health (Madras Presidency) (1946–1951)
Ramiengar, Dewan of Travancore from 1881 to 1887.
Sir V. Bhashyam Aiyangar (1844–1908) Lawyer and jurist. First Indian Advocate-General of Madras.
P. Rajagopalachari, Dewan of Cochin from 1897 to 1901 and Travancore from 1904 or 1906 to 1914.
Sir V.T.Krishnamachari - Dewan of Baroda.
C. Vijayaraghavachariar - The Lion of South India.[3]
C Rajagopalachari - Bharat Ratna, Freedom fighter, national leader, the first Indian Governor General of Independent India and also the Chief Minister of State of Madras.
C. V. Rungacharlu (1831–1883), Indian civil servant. Diwan of Mysore kingdom from 1881 to 1883.
Dr.K.Sreenivasan IPS, Senior Bureaucrat and Former DG & IGP, Karnataka.
Entertainers
Hema Malini (b.1948) - Indian actress, director and producer, Bharatanatyam dancer-choreographer, politician with the Bharatiya Janata Party(BJP).[4]
R. Madhavan (b.1970) - Indian actor, writer, film producer and television host.[5]
Vasundhara Das (b.1977) - Indian actress and singer.[6]
Literature
Chikkupadhyaya - Kannada writer, teacher of Chikka Devaraja Wodeyar.
Yoga
Nathamuni Authored Yoga Rahasya
Sri Tirumalai Krishnamacharya - Father of modern yoga, yogi and healer who taught B.K.S. Iyengar, Sri K. Pattabhi Jois, and Indra Devi.