Little Lord Fauntleroy is a popular phrase that typically refers to a young boy who is dressed and behaves like a member of the upper class. While this phrase has a very specific meaning, there are several synonyms that can be used to describe a similar type of child. Some possible options might include terms like, "aristocratic youth," "upper-crust scion," or "noble scion." Other options could include "privileged prince," "high-society scion," or "blue-blooded offspring." Regardless of the term used, the implication is generally the same; these are children who are raised in a very affluent and privileged environment, and who often behave accordingly.