Do English cities with names ending in chester such as Manchester bear witness to Norse invaders?

Yes, English cities with names ending in "chester," such as Manchester, do reflect the influence of Norse invaders, although the suffix itself is derived from the Latin Word "castra," meaning "fort" or "camp." Many of these names originated from Roman settlements, which were later adopted and adapted by the Anglo-Saxons and Norse. While the Norse did establish settlements and influence the culture in various regions, the "chester" suffix primarily points to earlier Roman military sites rather than direct Norse origins.