What is "satyaki"

Yuyudhana (, ), better known as Satyaki (, ), was a powerful warrior belonging to the Vrishni clan of the Yadavas, to which Krishna also belonged. According to the Puranas, he was grandson of Shini of the Vrishni clan, and son of Satyaka. A valiant warrior, Satyaki was devoted to Krishna and was a student of Arjuna.