411 REFERENCE · Wiktionary
Her Serene Highness
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Pronoun
en pronoun her serene highness masculine His Serene Highness plural Their Serene Highnesses
en formal An honorific style used in referring to a female personage of any of a variety of certain dignities, but chiefly a reigning or sovereign prince, such as those of Liechtenstein and of Monaco.
en 1982 Trevor Hall Her Serene Highness Princess Grace of Monaco Greenwich House main title https://books.google.com/books?id=NgTjAAAAMAAJ 1
See also