Question

who were called Nadu​

Answer 1

Answer:

Naadu நாடு means Country.

Nadu நடு means center. It also means implanting. That is நாற்று நடு means implanting of young paddy.

Answer 2

Answer:

The fall of the Madurai Nayaks brought up many small Nayakars of southern Tamil Nadu, who ruled small parcels of land called palayams. The chieftains of these Palayams were known as Palaiyakkarar (or 'polygar' as called by British) and were ruling under the nawabs of the Carnatic.