The Chera dynasty, also known as Keralaputra, from the early historic or the Sangam period in southern India, ruled over parts of present-day states Kerala and Tamil Nadu. The Cheras, known as one of the mu-ventar of Tamilakam alongside the Cholas and Pandyas, have been documented as early as the third century BCE. The Chera country was geographically well placed at the tip of the Indian peninsula to profit from maritime trade via the extensive Indian Ocean networks. Exchange of spices, especially black pepper, with Middle Eastern or Graeco-Roman merchants is attested to in several sources. Chera influence extended over central Kerala and western Tamil Nadu until the end of the early historic period in southern India.