Hi!

(am I the only one who thinks that i and ! when next to each other (like this i!) look weird)

However my question is different.
I always see different ways of writing English and Irish County names.

Hereford, Herefordshire, County Hereford, Co Hereford, Hrfd
Devon, Devonshire, County Devon, Co Devon
Co Galway, County Galway

as well as Scottish Inverness-shire, Inverness, Rosshire, Perth and Perthshire

and so on. Sometimes the part shire is absent, sometimes it's Co instead of County

Sooo. What form is the most common and useful and what is just the common short form which is used simply because it is shorter and everyone knows what it means?

Thank you!

edited: basurero, спасибо тебе большое за исправления!