Guru Har Krishan ([ɡʊru həɾ kɾɪʃən]; 23 July 1656 – 30 March 1664) was the eighth of the ten Sikh Gurus. At the age of 5, he became youngest Guru in Sikhism on 7 October 1661, succeeding his father, Guru Har Rai.He is also known as Bal Guru (Child Guru). He died at age eight during a smallpox epidemic in Delhi, and his granduncle Guru Tegh Bahadur became the next Guru of the Sikhs.