* "Font": This is a common French element found in many place names, meaning "fountain" or "spring".
* "Leroy": This is a common French surname meaning "the king".
Therefore, "Fauntleroy" literally means "fountain of the king" or "king's spring".
It is likely that the name originated as a place name, possibly describing a location with a spring or fountain associated with a royal figure. Over time, it was adopted as a surname and eventually a given name.