John Moss 
Celtic Places & Placenames [PDF ebook] 
Heritage Sites & the Historical Roots of Six Nations

‘Celtic Places’ are typified by some several hundred townships and villages whose names still bear the imprint of their earliest Celtic roots, but the scope of the book is not restricted to human settlements; it is also true of the many mountains and rivers that they named, and to several thousand sites of standing stone monuments, Celtic high crosses, henges, hill figures, funeral barrows and hillforts, which are all included in the book. What they all have in common is that they reflect the rich cultural heritage that was implicit in the names of places in the British Isles and Ireland as it existed before the Romans arrived.