Hello Gale,
Don't worry - the British Royal family have blood ties with Hannover. As you have already discovered Brunswick is the English translation of Braunschweig. You will find the Duke of Brunswick is mentioned in British history.
<<PS: My spell checker keeps wanting to change Braunschweig
to Brunswick.>>
I suggest you add 'Braunschweig' to your spell checker.
Rena in England