Nandivardhana was a chief of the NÃÂya Republic in Kundagrama, a suburb of Vaishali (Basarh in modern-day Bihar). He was the elder brother of Mahavira, the 24th Jain Tirthankara. His father was Siddhartha..According to the second chapter of the à ÂvÃÂtÃÂmbara ÃÂcÃÂrÃÂá¹ ga Sà «tra, Siddhartha and his family were devotees of Parshvanatha.