The Roman military camp town that became Chester in England was called Deva Victrix.
Deva Victrix was a major Roman fortress established near the River Dee in the late first century CE. Its name combined Deva, probably derived from a local river name meaning “goddess,” with Victrix, a title associated with the victorious XX Valeria Victrix legion. The fortress occupied a strategically important position in northwestern Britain.
The site developed into an extensive military and civilian settlement. Its surviving amphitheatre, defensive walls, barracks, and other remains show the importance of Chester within Roman Britain. The fortress also helped support Roman campaigns in Wales and northern Britain.
Londinium was Roman London, Eboracum was Roman York, and Camulodunum was Roman Colchester. Those names therefore refer to different settlements, not the Roman predecessor of Chester.