Did Megan get her's taken away while she was still a Royal? Did she get it back for some reason?
The Titles of Nobility Amendment is a proposed amendment to the United States Constitution. The 11th Congress passed it on May 1, 1810, and submitted to the state legislatures for ratification. It would strip United States citizenship from any citizen who accepted a title of nobility from an "emperor, king, prince or foreign power." On two occasions between 1812 and 1816, it was within two states of the number needed to become part of the Constitution. Congress did not set a time limit for its ratification, so the amendment is still pending before the states. Ratification by an additional 26 states is now needed for its adoption.
https://en.wikipedia.org/wiki/Titles_of_Nobility_Amendment