Hi Billina !!!
I agree with
Janan.
King Leopold II of Belgium is my first thought.
It is a pity because my second link is the movie '
Kate &
Leopold' where
Hugh Jackman plays the role of a fascinating and romantic nobleman.
So this name is strongly linked with aristocracy but unfortunately the real-life link is stronger than the fictional one.
Personal Name Lists
https://www.behindthename.com/pnl/125456