Isabella FitzRoy, Duchess of Grafton
| The Duchess of Grafton | |
|---|---|
| 1686 Oil painting of Isabella, Dutchess of Grafton by Willem Wissing | |
| Personal details | |
| Born | Isabella Bennet c. 1668 | 
| Died | 7 February 1723 | 
| Spouses | |
| Children | Charles FitzRoy, 2nd Duke of Grafton | 
| Parent(s) | Henry Bennet, 1st Earl of Arlington Elisabeth of Nassau | 
Isabella Bennet FitzRoy, Duchess of Grafton and later 2nd Countess of Arlington suo jure (c. 1668 – 7 February 1723), was a British peer and heiress.