Complex sentence: He derived his pen name from the suffixes of his wife name Kalyani and his name Krishnamurthy in Tamil form கல்யாணி and கிருஷ்ணமூர்த்தி as Kalki (கல்கி) "Kalki avatar", the tenth and last avatar of the Hindu God Vishnu.
Split into simpler sentences: He derived his pen name from the suffixes of his wife name Kalyani and his name Krishnamurthy in Tamil form கல்யாணி and கிருஷ்ணமூர்த்தி as Kalki (கல்கி). His name also represents "Kalki avatar", the tenth and last avatar of the Hindu God Vishnu.