Nataji was given a new name when he joined the terrorist cell lead by The Wraith. He was told that his actual name was given to him by his opressors and was givin the name of one of the founding fathers of America. The historical John Adams was an American lawer, statesman, diplomat and political theorist, as well as a leading champion of independence in 1776, he was the second President of the United States.
After joining the terrorist cell lead by The Wraith, Nataji was given a new name and purpose. The point of the organization was to stand up for the rights of the oppressed minority, to no longer take unwarranted behavior from other classes and racial groups. This was something that John believes in and wants to help correct.