Bhai Kalu Mehta (1440-1522) who was also known as Kalian Chand, Kalu Rai, Mahita Kalu was a Patwari by profession - an accountant of land revenue in the government. Kalu Mehta was the father of Guru Nanak Dev, founder of Sikhism. Kalu ji was married to Mata Tripta who was the daughter of Baba Rama and Mata Banarasi of Chahal, a village near Lahore. They had two children - a daughter called Bibi Nanaki born in 1464 and a son called Nanak, who was born in 1469.