It's difficult to do it by county in Wales 'cause whoever's in charge of that stuff keep changing the county names and borders. But, they certainly exist for regions and 'old' counties. Cardis (from Cardiganshire - ie. Ceredigion today) are supposed to be EXTREMELY careful with their money for instance. Then there are names for the populace of certain areas, like Moch Mon (Anglesey Pigs), The Down Belows (for people in south Pembrokeshire), Swansea Jacks (suave b*st*rds supposedly), St Peters Boys are from Carmarthen Town, Cofis from Caernarfon, etc.

sian