Early-attested site in the Parish of Buckland Monachorum
- Dudenham 1281 Ass
- Dydeham 1281 Ass
- Dideham 1312 Cl
- Dedeham 1542 Oliver
'Dydda 's ham(m).'This pers. name is not recorded but is found in to dyddan þorne BCS 596 and enters into Didcot(e) (Berks, Gl).