According to Wiki,” The Palm leaf manuscripts are one of the oldest media of writing in India. The source for writing and painting in Nandinagari is a Brahmic script derived from Nāgarī script which appeared in the 7th century AD.
It is a sister script to Devanagari, which is common in other parts of India.
Nandi Nagari has been found in Tamil Nadu. The 8th century Narasimha Pallava’s stone inscriptions in Mamallapuram on Tamil Nadu’s coast, the 10th-century coins from Chola king Rajaraja’s period, the Paliyam copper plate inscriptions of the 9th century Ay king Varagunam are all in Nandi Nagari script.
A Rigveda manuscript has been found written in Nandi Nagari script, as well as manuscripts of other Vedas.
Manuscripts of the first century BCE Vikramacarita, also known as the “Adventures of Vikrama” or the “Hindu Book of Tales”, have been found in Nandinagari script.
Vikramaditya means “the sun of Valor” (Vikrama means “Valor” and Aditya means “sun”). He is also known as Vikrama, Bikramjit, and Vikramarka (arka also means “sun”)”.