Where does “Derbyshire” come from?

Derbyshire derives from English Derby, a place name of uncertain ultimate origin whose etymology remains undetermined.

Ancestry of “Derbyshire”, step by step

Step	Language	Word	Meaning
1	Middle English	Derbyschire	—
2	Old English	Deorbyscir	—
3	Old English	Dēorbȳ	—
4	Old Norse	Djúra-bý	—
5	Old Norse	dýr	animal
6	Proto-Norse	*ᛞᛖᚢᛉᚨ	—
7	Proto-Germanic	deuzą	animal, beast
8	Proto-Indo-European	dʰewsóm	living thing
9	Proto-Indo-European	dʰéws	breath
10	Proto-Indo-European	dʰwes-	to breathe; breath; spirit, soul > creature

Derbyshire — Etymology, Origin & Word History | Etymology Explorer