Their changes were Location,Diet,practices,environment. Their status in Jerusalem was respect maybe even envied, royalty and or nobility. In babylon they were exiled kept to be servant. Changeing their names would help in getting rid of their faith, and cause them to forget where they were from, and focus more on the culture where they were now apart of, also to help and assimulate them into the culture. Being made an eunch would have an significant impact on their lives, never seeing their seed carried on. These men did not compromise, they would not difile themselves with the King's meat.