Kharshbun and Sharkhbun are brothers son of Sarban, the first son of the legendary Pashtun ancestor Qais Abdur Rashid. The Sarbani tribes, all supposed descendants of Sarban, form one of the major lineage branches of the Pashtun tribes. Kharshbun's progeny compose the Eastern Pashtuns, found in Afghanistan and Pakistan, and he had three sons Kand, Zamand, Kasi, whereas his brother Sharkhbun's progeny compose the Western Pashtuns, generally found in Afghanistan, the most famous of these latter Pashtuns being the Durrani or Abdali tribes. The following is a genealogical breakdown of Kharshbun's sons and the tribes that are said to be their descendants, as found in Olaf Caroe's history, The Pathans.
Gigyani tribe (Muk)
Zakhil or Zakhilwal