Early-attested site in the Parish of Hasland
- Gresmore 1549 Ct
- Grassmore 1568 ParRegChesterfield
- Grasmoore 1630 Plan
- Greherst 1086 DB
- Grayhirst, Greyhyrst 13th Welbeck
- Greyhirst Wood (sic) 1280–1300 DbCh
Grassmoor, Gresmore 1549Ct , Grassmore 1568 ParReg Chesterfield, Grasmoore 1630Plan . v. gærs , mōr 1 . It is perhaps to be identified with Greherst 1086 DB, Grayhirst , Greyhyrst 13thWelbeck , Greyhirst Wood (sic)1280–1300 DbCh, 'grey copse', v. grǣg 1 , hyrst . This identification is purely tentative and the names are in no way connected.