Pannu is a Sikh family name derived from "a Jat clan from the ancient Pannam dynasty".[1] It is also a sub-caste of Jats.[2]
Indian (Punjab): Sikh name based on the name of a Jat clan from the ancient Pannam dynasty.
There was a preponderance of Jats (e.g. Randhawa, Khera, Dhillon, and Pannu sub-castes) ...