Glasgow.
The biggest city in Scotland is Glasgow
Aberdeen is the third biggest city in Scotland.
Edinburgh
'cos there's no reason why it should be the biggest city (Washington DC is biggest?).
Inverness, Scotlaand is the fifth largest city.
There are a few Glasgow's around the world, eg Ontario, but there isn't one in Ireland. You may be thinking of Glasgow in Scotland where there was a large migration of Irish people in the late 1800's.
Edinburgh (is not a county) and is the second largest city (by population) The largest county is Cromarty
Glasgow, Edinburgh, Aberdeen, Dundee.
SCOTLAND obviously....
Glasgow with 580,690 population
It would be Highland, in northern Scotland.
The biggest city on Clydeside is Glasgow, but the only Capital in Scotland is Edinburgh.