the origin of the name Derby has had multiple influences: a variation of the original Roman name Derventio with pronunciation of the letter "v" as "b", becoming Derbentio, and later Derby, along with a link to the river Derwent - from the Celtic meaning "valley thick with oaks" - which flows through the city, triggering a shortened version of Derwent by, meaning 'Derwent settlement'.

The town name appears as Darbye on early maps, such as that of John Speed,