Who is Duke Marlebone?

Question

Who is Duke Marlebone?

Answer 1

Do you mean the Duke of Marlborough?  The first Duke of Marlborough, John Churchill (1650-1722), won a victory over the French at Blenheim on August 13, 1704, whereupon Queen Anne granted him a royal manor at Woodstock, Oxfordshire, built at her own expense.  Blenheim Palace remains the ducal seat.

John Churchill didn't have any surviving sons, so he passed his title through his daughter, Lady Anne Churchill, who married Charles Spencer, thus giving all Churchills from that time onward the double-barrel name of Spencer-Churchill.   The present Duke of Marlborough, the eleventh, is John George Vanderbilt Spencer-Churchill (b. 1926).  Incidentally, Winston Churchill's grandfather was the 7th Duke of Marlborough, and Winston was born in Blenheim Palace.

Answer 2

There is no Duke Marlebone that I can find in the UK.  Duke Street, Marylebone Duke Street is a street crossing the western half of Oxford Street, London and connecting Wigmore Street and Grosvenor Square.

Answer 3

I've never heard of Duke Marlebone.