Hochgeboren
Hochgeboren is a form of address for the titled members of the German and Austrian nobility, ranking just below the sovereign and mediatised dynasties.
The actual address is "Euer" Hochgeboren. It is the proper form of address for counts that are neither heirs to mediatised families of the Holy [Roman Empire] nor families who have been bequeathed higher predicate by the Emperor. By courtesy, barons belonging to old houses of the Uradel are also addressed in the same way.
The correct term for immediate counts is Erlaucht, while the proper form of address for princes and dukes is Durchlaucht.
In the Netherlands, Hooggeboren is used to address Dukes, Margraves, Counts or Viscounts. In Belgium, Hooggeboren is used in Dutch and Messire in French.