 The tradition is notable for its avatar doctrine, wherein Vishnu is revered in one of many distinct incarnations.Rama, Krishna, Narayana, Kalki, Hari, Vithoba, Kesava, Madhava, Govinda, Srinathji and Jagannath are among the popular names used for the same supreme being.The tradition has traceable roots to the 1st millennium BCE, as "Bhagavatism", also called "Krishnaism".