Can someone please explain me?

[Colwyn]

Yes, they are called "Cornish" people. Greetings fellow Celts.

[desmartinson]

Well of course they are Cornish people Colwyn, the same as Yorkshire people are from Yorkshire, Derbyshire people from Derbyshire, etc etc. but they are Counties not Countries.  

[Colwyn]

"County" is a foreign concept to these islands, brought over by those Scandinavians from Normandy in 1066 (whose families continue to provide "our" aristocracy) and best restricted to usage within England - i.e. excluding Scotland, Wales, all of Ireland and Cornwall. As John Betjeman said, referring to counties, "Only England really has Shires". Of course he forget one English county, which is definitely not a shire.
From Colwyn, in the City and County of Bristol (a County since 1373).

[badger]

Not too many deers to stalk in Chelmsford, (the county town of Essex) ytokgoz!  Unless of course, you are intending to stalk "old dears", of which there are plenty.         

Chelmsford is now a city Nick