Why does Booth called Dr. Brennan Bones? Is it a part of her real name या a nickname?

It's a nickname. :) He calls her बोन्स because she's a forensic anthropologist and works with bones.

The first answer is of course correct as anyone would expect. But something that has been overlooked about this दिखाना from the start is that they come up with जवाब as to cause of death and even suspects from looking at बोन्स and now even using holograms that can't exist to determine things that can't be done with बोन्स alone in most cases.

Booth just decided to call her that.. she didnt like it at first and kept trying to get him to stop, but he just ignored her and it stuck..