The Roman Map of Britain Gelava ? Ambleside, Westmorland

Gallunio var. Galluuio (R&C 113) next
Galava (AI 481₂ Iter x)

Galava is the commonly accepted form of the Roman name for Ambleside. Neither of the above forms is necessarily correct. The placement at Ambleside is entirely dependent on fixing the beginning of Iter X at Ravenglass.

If Galava is based on the name of a river (or lake?), then Celouion (R&C 178) might share the same base. R&C thought Celouion for Gelovion, based on W. gelau 'sword'.  The names of the river Gala (Scotland) and Aber-Gele(u) (Wales) may hold the answer. Johnston derived Gala Galu ca. 1143 from W. gal 'clear'. 

 'Sword-shaped' is a fitting description of the lake known as Windermere (a name of Norse origin, Winendemere ca 1160 'Vinand's lake'). The river that joins the Windermere at Ambleside is the Brathay, also a name of Norse origin. The river that connects Windermere to Morecambe Bay is the Leven Leuena 1157-63.

Ambleside NY3703

Ambleside Roman fort, associated vicus and Roman road
NATIONAL MONUMENT NO: 13567