What is "negroponte"

Negroponte, a name of the city of Chalkis and the island of Euboea of which it is the capital. The word is from the Greek phrase στὸν Εὔριπον 'to Evripos', rebracketed as στὸ Νεὔριπον 'to Nevripos', then interpreted as Negroponte 'black bridge' in Italian by folk etymology, the ponte 'bridge' being interpreted as the bridge of Chalcis. All of the senses below go back to this meaning, and not to an Italian original 'black bridge'.