"A Dictionary of the Pathan Tribes of the North West Frontier of India" (Part I. North of the Kabul River, including all Mohmands, and tribes west of the Indus), published by The General Staff Army Headquarter, Calcutta, India - (Originally Published 1910) :: The Khan Khel are mentioned on Page 26 (under ‘K’ -Khan Khel)
Khān, Muḥammad Ḥayāt (1981). Afghanistan and Its Inhabitants (in Urdu). Sang-e-Meel Publications. pp. Mentioned on page no. 626 under the title of Khandane Ghoriwala.
Haleem, Safia (24 July 2007). "Study of the Pathan Communities in Four States of India". Khyber Gateway. Archived from the original on April 30, 2013. Retrieved 4 May 2014. Farrukhabad has a mixed population of Pathans dominated by the Bangash and Yousafzais.