α. Old English Norðhembram (plural, transmission error), Old English Norðhembre (plural, rare), Old English Norðhymbræ (plural, rare), Old English Norþhymbre (plural), Old English Norðhymbre (plural), Old English Norðhymbro (plural, rare), Old English Norðhymere (plural, rare), Old English Norþhymre (plural, rare), late Old English Norþhimbre (plural).
β. late Old English Norþhumbre (plural), late Old English Norþhumre (plural), late Old English–early Middle English Norðhumbre (plural), Middle English Norþhober (plural, transmission error), Middle English Norþhumber (plural), Middle English Northumbre (plural), Middle English Norþhumbre, 1500s–1800s Northumber; also Scottish pre-1700 Northumbris (plural), pre-1700 Northwmbrys (plural).