NANDU is the Tamil dubbed version of the Telugu film 'Athadu' (2005), starring Mahesh Babu. 'Athadu' means 'there' or 'that place' in Telugu, and 'Nandu' is a common Tamil nickname used for the character in the dubbed version. Okkadu, Arya, and Anand are also Telugu films but not the source of 'Nandu'.