Khwaji Khel is a tribe or clan in jurisdiction of Tank District.
Origin Khwaji Khel is a sub-tribe of Malay zai or Mali zai, better known as the Mullazai tribe.
History Khwaji Khels are the descendants of Malay zai probably known as Mullazai.
References
http://www.thenews.com.pk/daily_detail.asp?id=192140