Not extinct but rather an ubiquitous patrilnieal
line among Indian Muslims and Urdu speaking Muhajirs of Karachi
Found when the Mughal Empire as a land
grant of the Kateher region in Uttar Pradesh I'm the 16th century
Rohilla settlers were mostly Pashto speaking settlers , with a smaller extent being Dari speakers. Notable tribes being Yousafzai, Afridi, Bangash, Mehsud etc. Most were Sunni but a
small number of them were Shia.
Rohillas had an unknown and ambiguous
relationship with Kshatriyah or rajput converts to Islam in Uttar Pradesh
In terms of Phenotypes , Rohillas did have a high frequency of fair
skin, blue/green/hazel eyes and Reddish/Golden hair however that began to decrease due to mixed marriages with other
Muslim communities ( or possibly because after conversion to Sunni Islam, the
dark pigmented folks of the population began to reproduce more than their fair skinned members , hence the population ending up dark as a whole )
In present times the community has almost completely assimilated into Khariboli Muslim culture, with no connection to Pashto speaking Pashtun community in the present
time . And sure the Pashto speaking community are not going to accept assimilated Descendants as Pashtuns