Which African city is named from the Greek word meaning "three towns"?

Tripoli is a Greek name that means "Three Cities", introduced in Western European languages through the Italian Tripoli.

Around the beginning of the 3rd century AD, it became known as the Regio Tripolitana, meaning "region of the three cities", namely Oea (i.e., modern Tripoli), Sabratha and Leptis Magna. It was probably raised to the rank of a separate province by Septimius Severus, who was a native of Leptis Magna.