Sultan ul Quam Nawab Jassa Singh Ahluwalia was a prominent Sikh leader during the period of the Sikh Confederacy. He was also Misldar of the Ahluwalia Misl. This period was an interlude, lasting roughly from the time of the death of Banda Bahadur in 1716 to the founding of the Sikh Empire in 1801. He founded the Kapurthala State in 1772.
Sultan ul Quam Nawab Jassa Singh Ahluwalia was born at a village called Ahlu. Hence, the name Ahluwalia stuck to him. Mata Sundari instructed him to study the art of sword and Sikh scriptures. He studied Sikh scriptures under Bhai Mani Singh. Later, Mata Sundari asked Nawab Kapur Singh to take charge of the promising youth. Nawab Kapur Singh was pleased with Jassa Singhs supreme devotion to the faith and a sense of duty and humility. He appointed him as a storekeeper with his forces.
Source: Wikipedia