Professor Sahib Singh (16 February, 1892 - 29 October 1977) was a renowned Sikh academic who made a tremendous contribution to Sikh literature. He was an exceptional grammarian, author, scholar and theologian born in a Hindu family in the village of Phattevali in Sialkot district of undivided Punjab. He was named Natthu Ram by his father, Hiranand, who kept a small shop in the village. Soon the family shifted to Tharpal, another nearby village in the same district.