County names may come viaa division that took its name from a centre of admin., an ancient kingdom, or an area occupied by an ethnic group. Most are in the 1st category: name of central town with the suffix "-shire" as Yorkshire. Former kingdoms became earldoms in united England e.g. Kent, former kingdom of Jutes. Counties ending in the suffix "-sex" are former Saxon kingdoms.The 3rd category includes counties such as Cornwall, Devon where names correspond to tribes.