The Pakistani Pathans are of indigenous origins. Afridis, Khataks and Dadis (Now Kakars) constitute the nucleus of the Pathans proper. Around this nucleus have collected many tribes of foreign origin.
The Afghan proper include the Tarin, Abdali or Durrani and Shirani, who have distinct origins from the descendants of the fugitive Gandhari, i.e. Yusufzai, Mohmand, and other tribes of Peshawar, who are Pathans by origin, but are more close to Afghans.
The Afghans and Ghilzais spread into Pathan territory and adopted their language and customs; and just as Irish, Scot and Welsh speaking the English language are commonly called Englishmen; so all who speak the Pakhto tongue came to be included under the name Pathan. Thus the Afghans and Ghilzais are Pathan by the virtue of their language, though not of Pathan origins.