Bhashyam Iyengar (6 November 1910 – 11 September 1987), better known by the pen name of Sandilyan, was an Indian writer known for his historical fiction novels in Tamil.

He is known for his historical romance and adventure novels, often set in the times of the Chola and Pandya empires.

Sandilyan was born in Tirukoilur (a town in present-day Kallakurichi District, Tamil Nadu) on 10 November 1910[1] to Ramanujam Iyengar and Poongovilvalli.

Impressed with his work, Kalki published his short stories like Kannammavin Kadhal, Adhirshtam in Ananda Vikatan.

After his stint at the Hindustan Times he returned to work at Sudesamithran and started writing full-length novels.

Sandilyan's most famous novels were serialised in Kumudam, a weekly Tamil magazine and was instrumental in increasing the circulation to a greater extent.

[1] In 2009, The Tamil Nadu Government announced its intention to nationalise Sandilyan's works (along with those of 28 other authors) and provide compensation to his legal heirs.