The Titles of Nobility Amendment was proposed in 1810 to affirm American opposition to foreign rule. In a sense, the amendment is already part of the Constitution. This is unlikely to be passed anytime soon.
If any citizen of the United States shall accept, claim, receive or retain, any title of nobility or honour, or shall, without the consent of Congress, accept and retain any present, pension, office or emolument of any kind whatever, from any emperor, king, prince or foreign power, such person shall cease to be a citizen of the United States, and shall be incapable of holding any office of trust or profit under them, or either of them.
I unequivocally support the Titles of Nobility Amendment - Smart aka Reuven.