January First-of-May
There's already an entry for “Charles X (pretender)”. I'm guessing it could be possible to set the other names to the same pattern - “Napoleon IV (pretender)” and so on.
That said, I don't see Louis XVII, Napoleon II and Aidan in the ruling authorities list at all. I'm guessing Henri V is Henri of Artois?
Henri of Artois is Henri V - or Henri, Count of Chambord.
I am not aware of any coins for Charles X after his dethronement in July 1830.
The words ‘Ruling Authority’ should be replaced with ‘Pretender’.
Aidan.