Iverni

thumb|upright=1.25|The Iverni ("Iwernoi" above) are one of the population groups mentioned in Ptolemy's Geography. The Iverni (, '''') were a people of early Ireland, first mentioned in Ptolemy's 2nd century Geography as living in the far south-west of the island. He also names a "city" called Ivernis (, ') in their territory, and observes that this settlement has the same name as the island as a whole, Ivernia (, '). These Iverni are identified with the Érainn (Érnai, Érna), a people attested in Munster and elsewhere in the early Middle Ages. They included the Corcu Loígde, Corcu Duibne, Corcu Baiscind, Múscraige and Déisi, as well as the Dál Fiatach and Dál Riata. Their royal dynasties are sometimes referred to as the Dáirine.

==Name== The name has been derived from Archaic Irish *Īwernī meaning "folk of *Īweriū " (the island of Ireland). This is in turn derived from Proto-Celtic *Φīwerjon- and further from Proto-Indo-European *piHwerjon- (the full, fat, fertile land) – cognate with the Ancient Greek píeira and Sanskrit pīvara, which refer to fertile land.