Early-attested site in the Parish of Sibson cum Stibbington
- Arnewassebrok 1278 Seldenii
- Arnewas 1279 RH 13th ADiv
- Arnewessebroke 1348 ADiv
'Earna's water-washed land' v. (ge)wæsc. Earna is not on record but would be a regular shortened form of one of the OE names in Earn -; cf. Erne , Earne in DB (TRE).