The story
- Proto-Celtic · derived from*derwom“oak trees”
- Proto-Brythonic · derived from*Deruentiū“forest of oak trees”
- Middle English · inherited fromDerwent, Derwente, Derwynd
- English todayDerwent
From Middle English Derwent, Derwente, Derwynd, from Proto-Brythonic *Deruentiū (“forest of oak trees”), derived from Proto-Celtic *derwom (“oak trees”) (compare Welsh derw (“oaks”)) (likely a compound with *wentā (“place”)).
Etymology from Wiktionary, CC BY-SA 4.0.