In 1764, his elder brother August William died, at which point Frederick Charles Ferdinand inherited Brunswick-Bevern and also became provost of St. Blaise and St. Cyriacus Abbey in Brunswick.
His elder brother August William died. This was in 1764. Frederick Charles Ferdinand inherited Brunswick-Bevern. Frederick Charles Ferdinand also became provost of St. Blaise in Brunswick. Frederick Charles Ferdinand also became provost of St. Cyriacus Abbey in Brunswick.