Dr. Robert Caldwell learned Tamil when he came to Tamil Nadu to do religious work. In the Dravidian language family, Tamil is known as the classical language. He studied linguistically that Tamilam was the Tramilam and the Tramilam was Dravidian and found that Tamil was the oldest and the first of the Dravidian languages. Knowing that Kannada, Telugu, and Malayalam are like Tamil with grammar and literary dialogues, he wrote a book of a comparative grammar book. In 1856, Caldwell was the first

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... o introduce the term "comparison grammar book of Dravidian languages" or "south Indian family languages" to the world of linguistics. This article explores the trend of moral literature and the literary records of family relations as a literary form in Tamil, Kannada, Telugu, and Malayalam, all the four Dravidian languages.