Question: can a us citizen have a royal title

Answer: No, In 1810, Democratic--Republican Senator Philip Reed of Maryland introduced a Constitutional amendment modifying the Title of Nobility Clause. Under the terms of this amendment any United States citizen who accepted, claimed, received or retained any title of nobility from a foreign government would be stripped of their U.S. citizenship. After being approved by the Senate on April 27, 1810, by a vote of 19--5 and the House of Representatives on May 1, 1810, by a vote of 87--3, the amendment, titled ``Article Thirteen'', was sent to the state legislatures for ratification. On two occasions between 1812 and 1816 it was within two states of the number needed to become a valid part of the Constitution. As Congress did not set a time limit for its ratification, the amendment is still technically pending before the states. Currently, ratification by an additional 26 states would be necessary for this amendment to be adopted.