Vannadasan, aka Kalyanji is a Tamil writer from India.

He was born as Siva Kalyana Sundaram in Tirunelveli in 1946, where he currently resides..

He writes short stories and non fiction articles under the pseudonym of Vannadhasan and poems under Kalyanji.

[1] He won the Sahitya Akademi Award for Tamil in 2016 for his short story collection Oru Siru Isai.

[citation needed] Some of his poems are translated by Jayanthasri Balakrishnan in English in her blog, though not published.