Leopold III, Prince of Lippe
Leopold III of Lippe was the sovereign of the Principality of Lippe reigning from 1851 until his death.
Leopold III was born in Detmold the eldest child of Leopold II, the reigning prince of Lippe and his consort Princess Emilie of SchwarzburgSondershausen . Being the heir apparent to the throne from birth he had the title Hereditary Prince.
Source: Wikipedia