1) Historical Celtic people 
The Cauci (Καῦκοι) were a people of early Ireland, uniquely documented in Ptolemy`s 2nd-century Geography, which locates them roughly in the region of modern County Dublin and County Wicklow. From the early 19th century, comparative linguists, notably Lorenz Diefenbach, identified the Cauci with the Germanic Chauci of the Low Countries and....