Early-attested site in the Parish of West Wycombe
- Filendene 1241 Ass
- Fillingden Wood c.1825 O
'Fila's valley' v. denu . Fila is not found but may be the full name of which Filica , preserved only in Filican slæd (BCS 1093) and the place-name Filkins (O), is the diminutive.