Ancestral background

The Barakzai claim descent from the children of Israel in a direct line through the first Israeli King Saul, whose family intermarried with the family of his successor King David.^[6][7] King Saul’s grandson the Prince (Malak) Afghana was grown up by King Solomon, acting as his commander in chief and Manager in the construction of the Temple Mount.^[8][9] However Prince Afghana sought refuge in a place called “Takht-e-Sulaiman”, where he settled as Exil Arch.^[10] A direct descendant of Prince Afghana in the 37th generation called Qais heard of the message of the Islamic prophet Muhammad and visited him in Medinah. Qais regarded Muhammad as the awaited Moschiach and embraced Islam under him. He changed his name Qais to Abdul Rashid Pathan and married a daughter of Khalid bin Walid.^[11][12][13]

Qais Abdur Rashid’s descendant Sulaiman, also known as “Zirak Khan” is regarded as the forefather of the Durrani Pashtuns to whom the Barakzai also belonged, next to the Popalzai and Alakozai. It is through Sulaiman’s son Barak, that the Barakzai derive their name from, because Barakzai means “children of Barak”.^[14]

source https://en.wikipedia.org/wiki/Barakzai_dynasty

King Zahir Shah, the last King of Afghanistan…