Northumbrian may refer to:
Languages
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present-day Northumbrian dialect, a variant of Northern English closely related to Scots
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historic Northumbrian Old English, a variety of Old English spoken in the Kingdom of Northumbria
People
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an inhabitant of the present-day region of Northumbria or North East England
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an inhabitant of the historic county of Northumberland specifically
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an inhabitant of the historic Kingdom of Northumbria
Transport
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Northumbrian (locomotive), a locomotive built in 1830 and first to encompass smokebox and firebox within the boiler barrel