Zabulistan

Zabulistan (Persian/Pashto: زابلستان; Zabul + -stan), originally known as "Zavolistan", is a historical region roughly corresponding to today's Zabul Province in southern Afghanistan. Zabulistan translates to "land of Zabul" or "land of the Zabuls". The name "Zabuls" is probably a transliteration of Zunbils, a Hindu and Buddhist dynasty that ruled the area during the Islamic conquest of Afghanistan.

Babur, founder of the Mughal dynasty in the 16th century, records in Baburnama that the territory south of the Hindu Kush between Kandahar and Ghazni is generally known as Zabulistan. According to Persian mythology, city of Zabol in eastern Iran, was the birthplace of Iranian hero Rostam.

From the 7th century to 11th century, the region was ruled by Shahi kings. Later, it was conquered by the Ghaznavids of Ghazni.

According to book writer André Wink,

"In southern and eastern Afghanistan, the regions of Zamindawar (Zamin I Datbar or land of the justice giver, the classical Archosia) and Zabulistan or Zabul (Jabala, Kapisha, Kia pi shi) and Kabul, the Arabs were effectively opposed for more than two centuries, from 643 to 870 AD, by the indigenous rulers the Zunbils and the related Kabul-Shahs of the dynasty which became known as the Buddhist-Shahi. With Makran and Baluchistan and much of Sindh this area can be reckoned to belong to the cultural and political frontier zone between India and Persia. It is clear however that in the seventh to the ninth centuries the Zunbils and their kinsmen the Kabulshahs ruled over a predominantly Indian rather than a Persian realm. The Arab geographers, in effect commonly speak of that king of "Al Hind" ...(who) bore the title of Zunbil."

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Wikipedia