Viscounts Hillsborough (1717)
- Trevor Hill, 1st Viscount Hillsborough (1693–1742)
- Wills Hill, 2nd Viscount Hillsborough (1718–1793) (created Marquess of Downshire in 1789)
Read more about this topic: Marquess Of Downshire
Viscounts Hillsborough (1717)
Read more about this topic: Marquess Of Downshire