The Ponnaiyar is a river in southern India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

. It rises on the hill of Nandidrug in Kolar District

Kolar district

Kolar district is a district in Karnataka state of India. The town of Kolar is the district headquarters. Kolar district is located in the southern region of the State and is the eastern-most district of the Karnataka State...

 of Karnataka

Karnataka

Karnataka , the land of the Kannadigas, is a state in South West India. It was created on 1 November 1956, with the passing of the States Reorganisation Act and this day is annually celebrated as Karnataka Rajyotsava...

 state, and flows south and then east for 400 km (248.5 mi) through Karnataka and Tamil Nadu

Tamil Nadu

Tamil Nadu is one of the 28 states of India. Its capital and largest city is Chennai. Tamil Nadu lies in the southernmost part of the Indian Peninsula and is bordered by the union territory of Pondicherry, and the states of Kerala, Karnataka, and Andhra Pradesh...

, emptying into the Bay of Bengal

Bay of Bengal

The Bay of Bengal , the largest bay in the world, forms the northeastern part of the Indian Ocean. It resembles a triangle in shape, and is bordered mostly by the Eastern Coast of India, southern coast of Bangladesh and Sri Lanka to the west and Burma and the Andaman and Nicobar Islands to the...

 at Cuddalore

Cuddalore

Cuddalore is a fast growing industrial city and headquarter of Cuddalore district in the Tamil Nadu state of southern India. Located south of Pondicherry on the coast of Bay of Bengal, Cuddalore has a large number of industries which employ a great deal of the city's population.Cuddalore is known...

.

The South Pennar River is known as Dakshina Pinakini in Kannada

Kannada language

Kannada or , is a language spoken in India predominantly in the state of Karnataka. Kannada, whose native speakers are called Kannadigas and number roughly 50 million, is one of the 30 most spoken languages in the world...

 and Thenpennai in Tamil

Tamil language

Tamil is a Dravidian language spoken predominantly by Tamil people of the Indian subcontinent. It has official status in the Indian state of Tamil Nadu and in the Indian union territory of Pondicherry. Tamil is also an official language of Sri Lanka and Singapore...

. It is also referred as Ponnaiyar .

The river originates in the Nandi Hills

Nandi Hills, India

Nandi Hills or Nandidurg is an ancient hill fortress of southern India, in the Chikkaballapur district of Karnataka state. It is located just 10 km from Chickballapur town and approximately 60 km from the city of Bangalore...

 in the Kolar district of Karnataka and flows through Tamil Nadu before entering into the Bay of Bengal.