The Iverni, later Érainn, were an ancient people of Ireland attested in Ptolemy's 2nd century Geography.
According to the historical scheme proposed by T.F. O'Rahilly the Iverni arrived in Ireland ca. 500 BC, and spoke a P-Celtic language known as Ivernic (see Primitive Irish).
A descendant group, the Corcu Loígde , gave their name to the modern county and city of Cork. Other proposed Ivernic groups include the Corcu Duibhne of County Kerry, the Déisi of Waterford and the Osraige of Ossory .
The Builg, identified with the historical Belgae and mythological Fir Bolg, may have been identical with, or a sub-group of, the Iverni.
See also
