If you look at subcontinent specially up and bihar there are many khan surname people (there is said to be a small yousufzai population in bihar like dr abdul Qadeer so excluding them ) but rest neither have pushtoon descent nor persian. i mean you will find people with locals features, color, bengali features bihari features etc but with foreign surnames like khan , qureshi, hashmi, farooquis , zuberis, zaidis. etc etc. with due respect to everyones looks, i am not disparaging anyone. But this thing always confuses me.
By the way i am an islamabadi , and my information about rest of pakistan is very poor.