The story
- Latin · derived fromRegnum Neapolitanum“Kingdom of the Neapolitans”
- Italian · derived fromRegno di Napoli
- English todayKingdom of Naples
A calque of Italian Regno di Napoli and Latin Regnum Neapolitanum (“Kingdom of the Neapolitans”), from the realm's capital at Naples.
Etymology from Wiktionary, CC BY-SA 4.0.