Where does “Isernia” come from?

Isernia (French) comes from Italian Isernia, from Latin Aesernia — situated in the valley of the Vulturnus, now Isernia.

Ancestry of “Isernia”, step by step

StepLanguageWordMeaning
1ItalianIsernia—
2LatinAeserniasituated in the valley of the Vulturnus, now Isernia
Every word from Latin Aesernia →Every word from Italian Isernia →