Guru Har Kishan was the eighth Sikh Guru.

Guru Har Kishan was born on 7th July 1656 in Kirtarpur, Shivalik Hills, Mughal Empire (present-day India). He is revered as the eighth Nanak. Guru Har Kishan was the eighth of the ten Gurus of the Sikh religion. Guru Har Kishan succeeded his father Guru Har Rai (the seventh Guru of the Sikh religion). On 7th October 1661 at the age of five, Guru Har Kishan became the youngest Guru of the Sikh Religion. He was also known as the Bal Guru. Guru Har Kishan passed away at the age of seven on March 30th, 1664 in Delhi, Mughal Empire (present-day India) due to smallpox thus making him the Guru with the shortest reign lasting 2 years, 5 months and 24 days.

Overall there are eleven Sikh Gurus. The eleventh Guru is the everlasting Sikh scripture known as the Guru Granth Sahib. This scripture is also known as the holy book of the Sikhs. The ten human-forms Sikh Gurus out of the eleven Sikh Gurus are as follows

First Sikh Guru was Sri Guru Nanak Dev Ji (born in 1469 – died in 1538)

Second Sikh Guru was Sri Guru Angad Dev Ji (born in 1504 - died in 1552)

Third Sikh Guru was Sri Guru Amar Das Ji (born in 1479 - died in 1574)

Fourth Sikh Guru was Sri Guru Ram Das Ji (born in 1534 - died in 1581)

Fifth Sikh Guru was Sri Guru Arjun Dev Ji (born in 1563 - died in 1606)

Sixth Sikh Guru was Sri Guru Hargobind Ji (born in 1595 - died in 1644)

Seventh Sikh Guru was Sri Guru Har Rai Ji (born in 1630 - died in 1661)

Eighth Sikh Guru was Sri Guru Har Kishan Ji (born in 1656 - died in 1663)

Ninth Sikh Guru was Sri Guru Tegh Bahadur Ji (born in 1621 - died in 1675)

Tenth Sikh Guru was Sri Guru Gobind Singh Ji (born in 1666 - died in 1708)