Giani Gian Singh (15 April 1822 – 24 September 1921) was a 19th-century Sikh historian, literati, hagiographer, martial artist, theologian, and scholar.

[1][2] He wrote the works Naveen Panth Prakash[note 1] and Twarikh Guru Khalsa.

[1] He was sponsored by Maharaja Narinder Singh and assisted Pundit Tara Singh Narotam for his work in writing the Sri Guru Tirath Sangreh.

[4] His work, Twarikh Guru Khalsa, was meant to be a simplification of the Suraj Parkash by Kavi Santokh Singh, which had been written in Braj verse that was difficult to decode.

[4] He reintroduced novel understandings about the compilation of the primary Sikh scriptural canon, the Guru Granth Sahib, by suggesting it was compiled through the collecting of various works by the previous gurus held by various, distant Sikh congregations, a process that took years.