Question: can a man legally change his last name

Answer: Yes, Usually a person can adopt any name desired for any reason. As of 2009, 46 states allow a person legally to change names by usage alone, with no paperwork, but a court order may be required for many institutions (such as banks or government institutions) to officially accept the change. Although the states (except Louisiana) follow common law, there are differences in acceptable requirements; usually a court order is the most efficient way to change names (which would be applied for in a state court), except at marriage, which has become a universally accepted reason for a name change. It is necessary to plead that the name change is not for a fraudulent or other illegal purpose, such as evading a lien or debt or for defaming someone else.