Krishnan was born in a small village named Rappal, in Thrissur district, then in the Kingdom of Cochin and now in the South Indian state of Kerala on 22 September 1911.
Krishnan was born in a small village known as Rappal, located in the Thrissur district of Cochin Kingdom, an area that is currently part of the South Indian state of Kerala on September 22, 1911.