Isabella was the daughter of Henry Bennet, 1st Earl of Arlington, a Royalist commander, by his wife Isabella de Nassau (1633–1718). (Her mother was a daughter of Louis of Nassau-Beverweerd and thus a granddaughter of Maurice of Nassau, Prince of Orange and a great-granddaughter of William the Silent).
On the death of her father in 1685, Isabella succeeded to his titles suo jure. 1668-1622 April 1672: The Honorary Isabella Bennet 22 April 1672 – 1 August 1672: The Lady Isabella Bennet 1 August 1672 – 1675: The Rt.
Honorary
The Countess of Euston 1675-1677 February 1723: Her Grace The Duchess of Grafton 28 July 1685–: The Countess of Arlington (suo jure) Isabella is one of the Hampton Court Beauties painted by Sir Godfrey Kneller for Queen Mary World War II Isabella walked at the coronation of Queen Anne.
