Analysis of information sources in references of the Wikipedia article "افغان (نام قومی)" in Persian language version.
The earliest mention of the name 'Afghan' (Abgan) is to be found in a Sasanid inscription from the 3rd century, and it appears in India in the form of 'Avagana'...
[To Ormuzd Bunukan , ... greetings and homage from ... ) , Pithe ( sot] ang (?) of Parpaz (under) [ the glorious ) yabghu of [Heph] thal , the chief … of the Afghans
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ناموجود یا خالی (کمک)