Early-attested site in the Parish of West Wycombe
- Fastindige 1197 Fines
- Fastendich 1269 Ch
- Fastyngdiches 1477 IpmR
This is probably a compound of fæsten and dic , hence 'stronghold-ditch.' The exact site is unknown but it was probably in this parish and may have been near Widdenton.It is probably the source of the Bucks family name Fastnidge noted in Records of Bucks , xi. 174–86.