Lord Krishna is the one and only supreme, he has lived about 5000 years ago during dwaparyuga, he has controlled the Arjuna's chariot during the kurukshetra war, The dwarkadhish one and only lord who take birth in every yuga to destroy evil and restore Dharma. He's the 8th Avtar of Lord Vishnu (Hari), Lord Krishna has been worshipped with his loved sakhi Radha, even before taking Krishna's name we say Radha, Radhakrishna, Radhekrishna.