Nandivarman III was an Indian monarch of the Nandivarman II

Nandivarman II

Nandivarman II was a Pallava ruler who ruled in South India.-Ascension to the Throne:In A.D 731, the Pallava king Parameswaravarman died without any heir and hence the Pallava empire was kingless...

 line who ruled the Pallava kingdom from 846 to 869. He was the son of Dantivarman

Dantivarman

Dantivarman was an Indian monarch who ruled the Pallava kingdom from 795 to 846. He was the son of Nandivarman II.- Reign :Dantivarman ruled the Pallava kingdom for 51 years. During his reign, the decline of the kingdom had set in. Pandyan intrusions in the south reduced the Pallava territory to...

 and grandson of Nandivarman II.

Reign

Nandivarman III was a powerful monarch and tried to reverse the decline that had set in in the reign of his father. He made an alliance with the Rashtrakutas and the Gangas and defeated the Pandyas at Thellar near Kanchi. He then pursued the retreating Pandyan army as far as the river Vaigai. The Pandyan king Sri Vallabha

Sri vallabha

"Sri" is a Sanskrit word denoting the mythological Hindu goddess of wealth, Lakshmi. She is the wife of Lord Vishnu."Vallabha" in Sanskrit means husband."Sri vallabha" refers to the husband of Lakshmi, Lord vishnu....

, however, recovered most of his territories and even defeated the Pallavas at Kumbakonam

Kumbakonam

Kumbakonam , also spelt as Coombaconum in the records of British India , is a town and a special grade municipality in the Thanjavur district in the southeast Indian state of Tamil Nadu. Located 40 kilometres from Thanjavur and 272 kilometres from Chennai, it is the headquarters of the Kumbakonam...

.

Nandivarman had a powerful navy and maintained trade contacts with Siam and Malaya

Malay Peninsula

The Malay Peninsula or Thai-Malay Peninsula is a peninsula in Southeast Asia. The land mass runs approximately north-south and, at its terminus, is the southern-most point of the Asian mainland...

.