Jathedar Bhai Tehal Singh Dhanju (1875 – 20 February 1921) played an important role in awakening the Sikh masses during Gurdwara Reform Movement in the early quarter of 20th century as also for the liberation of Sikh Gurdwaras from the corrupt Mohants. He is the leading Sikh figure among the list of Sikh martyrs who struggled for and volunteered the liberation of Gurdwara Nankana Sahib from the clutches of Mahant Narain Das on 20 February 1921. The supreme sacrifices made by Jathedar Bhai Tehal Singh and his other companions have been acknowledged by the grateful Sikh nation. From that day onwards, the Sikh nation remembers these brave Sikhs in their daily ardas (prayer). Every year on 21 February at this Shaheedi Asthan, Guru Granth Sahib's Swaroop with Bullet marks is brought to Deewan (assembly hall) from 2pm to 4pm for darshan of the Sikh Sangat.
Bhai Tehal Singh was born on Diwali Night of 1875, Dhanju Kamboj family of village Nizampur, District Amritsar. His father was Sardar Chanda Singh Dhanju and mother Sardarani Rukman Kaur Dhanju. The family moved to Chak No 38, Village Nizampur Deva Singh Wala, District Sheikhupur during the colonization of Lower Chenab Bar in the early years of 19th century. Bhai Tehal Singh went to Malaya in 1902 and for some time he worked as watchman in Kualalumpur but had to return to India in 1909 due to some family issue. He again left for Malaya in 1911 but due to death of his father in 1915, he had to come back again in 1915.
Soon after his second return from Malaya, Bhai Tehal Singh took Amrit-pan and jumped into the Sikh Gurdwara Reform Movement. He played a very active role to awaken the migrant Sikh farmers of the Canal Colony, Sheikhupura, and spread the message of Sikh Gurus in numerous villages around Nizampur Deva Singh Wala. He participated in the Political Conference of Dharowal as well as in the Movement started by the Sikh Community to liberate Gurdwara Sacha Sauda Chuharkana and Gurdwara Tarn Taran from the control of Mohants. Bhai Tehal Singh had joined the squad which went to liberate Gurdawara Tarn Taran from the Mahant control on 26 January 1921 and was badly injured in the brick-bats thrown at the Jatha volunteers by the pujaris. He also volunteered in the morcha launched by Sikhs in connection with Gurdwara Rikab Ganj wall in Delhi.