Ayya, amma and bhaiya

M Venkaiah Naidu also told the rally that the upcoming Lok Sabha election is not an election for ayya (the Tamil word for elderly men in a family), amma (mother), but bhaiya. Ayya was a reference to DMK chief Karunanidhi, and rival party AIADMK's head Jayalalithaa is widely referred to as amma. So who is the bhaiya? No prizes for guessing, since Naidu was addressing a public meeting in Chennai at which Narendra Modi spoke as well.