change in name only

Is there a way you can change the name of a civilization, unit, and/or leader. For example: In the original game, it's Sumeria, Trader, and TEDDY Roosevelt. But I wish to them change them to: Mesopotamia, Merchant, and THEODORE Roosevelt, respectively. I think you can go into the .xml files...

http://www.bbc.com/news/world-europe-40233702 Andres Breivic changed his name to Fjotolf Hansen. I would like to ask why he chose this name, considering that while Hansen is (by the article) pretty common a surname there, Fjotolf is very rare as a first name, so anonymity (while you are in...