In Born A Crime, author Trevor Noah explains in his memoir that most Xhosa (Xhosa forms the second largest ethnic group in South
Africa) names become self-fulfilling prophecies; his mother Patricia, "Nombuyiselo," means "She Who Gives Back," and is fitting: even as a child, she would care for younger, abandoned children. So, to exempt her son from fate, she names him "Trevor, a name with no meaning whatsoever in South Africa, no precedent in my family. It's not even a Biblical name." This example demonstrates: A ode B objective C opsis D onomastics
Onomastics can be defined as the science or study concerning the origin, history, forms, and uses of proper names of persons or places. The whole excerpt we read in the question is an example of onomastics. Proper names are being analyzed - their origin and meaning, and even how they can influence someone's life by becoming self-fulfilling prophecies.
The Kite Runner focuses nearly exclusively on male relationships. While the relationship between father and son is important to the novel, male friendship is central as well. Amir's relationship with Hassan is the most obvious example.