He was the son of Hercule Meriadec de Rohan, prince de Guéméné and Louise-Gabrielle Julie de Rohan; brother of cardinal de Rohan, and Jules, prince de Guéméné.
The young man was the child of Hercule Meriadec de Rohan, prince de Guéméné and Louise-Gabrielle Julie de Rohan; brother to the cardinal de Rohan, and Jules, prince de Guéméné.