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Both are named after the Earl of Hillsborough.
Etymology from Wiktionary, CC BY-SA 4.0.
Hillsborough County
Hills·bor·ough Coun·tyToday it means: One of 67 counties in Florida, United States. County seat: Tampa. Full definition →
Today it means: One of 67 counties in Florida, United States. County seat: Tampa. Full definition →
Both are named after the Earl of Hillsborough.
Etymology from Wiktionary, CC BY-SA 4.0.