Arewe

According to the Old English Dictionary:

Arwe, an;

Arewe

f. [arewe arrow] ARROW, the name of a river in several counties, called so either from its swiftness or straightness, also the Orwell ; fluvii nomen :-- Se here gewende ðá fram Lundene, mid hyra scypum, into Arewan [MS. Laud. Arwan] the army [of the Danes] went then from London, with their ships, into the river Orwell [in Suffolk], Chr. 1016; Erl. 157, 14. Gibson says of Orwell, - Hunc suspicor anti-quitus fuisse pronunciatum Arwel, tum quod Saxonicum A sequentibus sæculis transiit in O, tum etiam quod oppidum est ad ejus ripam situm, Arwerton dictum; accedit quod Harewich ad oram hujus fluminis, olim Arwic, non ut conjectat Camd. Herewic, dici posset, Gib. Chr. Explicatio 13, col. 1. arewe