Pathan is called Afghan because Afghans say that Afghan was the name of a son of Hazrat Sulaiman (as) and he fell in love with the language of jinn, so he asked his father Hazrat Sulaiman (as) to tell jinn that Learn Language Suleiman accepted his son’s request and ordered the jinn to teach Afghans the language of jinn, a language later known as Pakhtuns. They are descendants of Abraham (peace be upon him) and descendants of Isaac (peace be upon him).
That the Pathans lived in a part of Argentina, the people of Argentina claim that the Afghans or the Pathans of Argentina are among us. The tribes of Israel settled in Afghanistan after a lot of hardships and troubles. When the Holy Prophet (PBUH) started preaching Islam and people started entering Islam in droves, then the leader of Pathan nation named Qais Abdul Rashid and his whole family He came to the presence of Muhammad and swore allegiance to Muhammad and became a Muslim.
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Therefore, wherever there are Pakhtuns in the world, there will be Muslims. Pakhtuns are the only nation in the world in which there is no religion without Islam. So the answer would be that I have been a Pakhtun for five thousand years and a Muslim fourteen hundred years ago. The Afghan nation is called Pathan. When the infidels captured Mecca, Prophet Muhammad (peace be upon him) ordered Khalid bin Waleed to go and call his Afghans to fight Khalid bin Waleed. Allah Almighty went to Afghanistan and sent the message of Holy Prophet (PBUH) to Afghan Sardar Qais Abdul Rashid.
Lashkar led by Qais Abdul Rashid left for Makkah. In the evening, the Companions gave the glad tidings to the Holy Prophet (PBUH) that as soon as the Afghan army arrived, they started killing the infidels and eliminated all the infidels, and Makkah was conquered by the Afghans. On the blessed tongue of the Prophet (peace and blessings of Allaah be upon him) came the words Batan. This title was given to the Afghan nation by the Messenger of Allaah (peace and blessings of Allaah be upon him). When this word reached the subcontinent, it became Pathan from Batan