What is "sarbani"

Sarbaṇī are the largest tribal group of Pashtuns. They are situated in Afghanistan and Pakistan. The Sarbani include many Pashtun tribes, among whom the most numerous are the Tareen, Durrani historically Abdali, Barakzai, Yusufzai, Gigyani, Mohmand, Khalil, Ghoryakhel, Shinwari, Kasi , and Muhammadzai (Hashtnagar). According to the Pashtun legend of origins, the members of the Sarbani group all descend from Sarban, who was the first son of the legendary founding father of the Pashtun people, Qais Abdur Rashid.