| Entry Type | Person |
| Surname | Portland |
| Forenames | William Henry Cavendish Cavendish-Bentinck |
| Title | Duke |
| Epithet | 3rd Duke of Portland; of Welbeck Abbey and Bolsover Castle. |
| Dates | 1738-1809 |
| Authorised Form of Name | Portland; William Henry Cavendish Cavendish-Bentinck (1738-1809); Duke; 3rd Duke of Portland; of Welbeck Abbey and Bolsover Castle. |
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