Kalu Nath, son of Bhai Jaimal, was a Yogi of Nathana (district Firozpur). Earlier he was a Vaishnav Sadhu, but later, he joined Sikh faith at the time of Guru Hargobind Sahib. During the battle of Mehraj (December 1634), Bhai Kalu Nath served Guru Sahib and the soldiers with food and milk. After the battle was over, Guru Sahib visited Kalu Nath’s at his place, at village Nathana. His name has been mentioned as Kalu Das also.
(Dr Harjinder Sinh Dilgeer)