Short biography by David Godman in his introduction to Guru Vachaka Kovai:
"Muruganar is widely regarded as being one of the most eminent and influential of Ramana Maharshi's devotees. He was instrumental in persuading Bhagavan to compose both Ulladu Narpadu and Upadesa Undiyar, two of his most important philosophical works, and he was also responsible for prompting Bhagavan to write down more of his teachings in Ramana Puranam, a long 540-line poem that he jointly authored with Muruganar. In addition to these endeavours he composed many thousands of verses of his own which mostly fall into one of the following categories: expressing his own experience of the Self; praising Sri Ramana and expressing his gratitude towards him; recording teachings that he had heard Sri Ramana say. His output was prodigious: in fifty years of writing on these topics he managed to compose in excess of 20,000 verses. In his earlier life, Muruganar was known has C. K. Subramania Iyer, although his parents called him Sambamurthi. Before coming to Bhagavan he was a well-respected Tamil scholar who served on a prestigious commitee that was compiling the definitive Tamil dictionary. He also worked as a schoolteacher and private tutor."