A. R. Raja Raja Varma is known as Kerala Panini. https://en.wikipedia.org/wiki/A._R._Raja_Raja_Varma
He was a poet, grammarian and a professor of Oriental Languages at Maharaja's College Trivandrum. He was named Kerala Panini due to his writings in Sanskrit and Malayalam and due to his contributions to the Malayalam language.
His important works are Kerala Panineeyam, Bhashabhooshanam, and Vritha Manjari. Bhangavilaapam and Malayavilasam are his poems. Some of his best translation works are Bhasha Megha Dootu, Bhasha Kumara Sambhavam, Malayala Sakuntalam, Malavikagnimitram, and Charudattam.
A. R. Raja Raja Varma is said to be one of the most important influencers during the great literary renaissance in Kerala in the Golden Age of Malaylam literature.