I found this on Wikipedia.

Scholar Iffat Malik of the Institute of Strategic Studies Islamabad writes:

The Sudhans claim their origin from Afghanistan and they consider themselves to be descendants of a common ancestor Jassi Khan, who was an Afghan chief and had earned the name of Sudhan (from Sanskrit, meanings "justice, fair and honest") as a compliment to his valour as he 500 years or so ago landed in Western parts of Poonch and fought for their existence, but the local people dominated them in this period, they multiplied quickly and emerged into a strong and powerful tribe. According to them, they are same as the Sudhazai tribe of high class Afghans. In social habits and customs they also are certainly akin to Sudhazais of Afghanistan. Among Afghans, Sudhazai are a very respected clan with long good history behind them. Sikhs and Dogras had to fight the Sudhans in wars spread over a fairly long time as they had never been reconciled to their rule by them, and there was first rebellion in 1837, after Sudhan people went in revolt against Sikh Empire, had captured hills from Sikhs, however Sudhans were defeated by Sikhs but survived as a strong tribe. In 1947, Sudhans were first to challenge Dogras.

Malik, Iffat (2002), "Jammu Province", Kashmir: Ethnic Conflict International Dispute, Oxford University Press, p. 62, ISBN 978-0-19-579622-3