legal name

1 :  a person's name that is usually the name given at birth and recorded on the birth certificate but that may be a different name that is used by a person consistently and independently or that has been declared the person's name by a court Editor's note: If a person seeks to change a name by judicial process, the court may not deny the change absent any indication of a fraudulent purpose. In some states, a woman's legal name is presumed to include her husband's last name.

2 :  the designation chosen by a business entity (as a corporation) and reported to the state (as in the articles of incorporation)