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, generally found in modern day Pakistan, whereas his brother Sharkhbun's progeny compose the Western Pashtuns, generally found in Afghanistan, the most famous of these latter Pashtuns being the
Durrani tribe. 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. Kharshbun: