Early-attested site in the Parish of Semington
- Wadone 1086 DB
- Waddune 1234 Longleat
- Waddon 1249,1268,1289,1394 Ass 1254 Ipm
- Whadone 1363 FF 1428 FA
- Whadon 1523 SR
Whaddon is Wadone 1086 DB, Waddune 1234Longleat , Waddon 1249, 1268, 1289, 1394Ass , 1254 Ipm, Whadone 1363FF , 1428 FA, Whadon 1523SR . 'Woad hill,' v. dun . The name would have reference to a hill where this plant grew. Later the name has been influenced, perhaps by association with Whaddon from OE hwǣte -dūn , 'wheat-hill.'