legitimist
/ˈlɛdʒɪtɪmɪst/Definitions
1. noun
A person who advocates or supports the restoration of the Bourbon dynasty to the French throne, especially in the 19th century.
“The legitimist movement gained momentum in the years following Napoleon’s defeat.”
2. noun
A person who believes in or advocates for a particular system of government or a specific claim to a throne or a title.
“The legitimist in the family insisted on the rightful heir being the king.”