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TheM. Ct. family, formerly known as theS. Rm. M. M. Ct. family, is a family of industrialist and bankers fromTamil Nadu,India. Belonging to theNagarathar community, they are descendants ofS. Rm. M. Chidambaram Chettiar of theS. Rm. M. family and trace their ancestral roots toKanadukathan in theSivaganga district.

• Sir M. Ct. Muthiah Chettiar (1887-1929), eldest son of S. Rm. M. Chidambaram Chettiar. Director ofIndian Bank and member of the Imperial Legislative Council of India. First Nattukottai Chettiar to be knighted.
• Diwan BahadurM. Ct. Pethachi Chettiar (1889-1924), second son of S. Rm. M. Chidambaram Chettiar.Zamindar of Andipatti.

• M. Ct. M. Chidambaram Chettyar (1908-1955), oldest son of Sir M. Ct. Muthiah Chettiar. Founder ofIndian Overseas Bank (IOB) andTravancore Rayons Limited.

• M. Ct. Muthiah (1929-2006), oldest son of M. Ct. M. Chidambaram Chettyar. Industrialist and banker.

• Business families of India
• Banking families

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