"Here in south Wales we call the northerners Gogs and they call us Hwntws. Taffs are from the Valleys."

It may be purely a coincidence but in Albania the people of the mountainous north are called 'Ghegs' (or 'Gegs') whilst southerners are 'Tosks'.

Also in Albania, Northern Greece, Kosovo and Western Macedonia are a group of people called 'Vlachs' who speak a romance language similar to Romanian. I have been led to understand that 'Vlach' means 'stranger' (in Greek?) and is from the same linguistic root as 'Wales/Welsh'.