Evia (ˈɛviə, ) also known by its antique spelling Euboea (juːˈbiːə, ; Εὔβοια Eúboia, ěu̯boi̯a, ˈevia) is the second-largest Greek island in area and population, after Crete, and the sixth largest island in the Mediterranean Sea. It is separated from Boeotia in mainland Greece by the narrow Euripus Strait (only at its narrowest point). In general outline it is a long and narrow island; it is about long, and varies in breadth from to . Its geographic orientation is from northwest to southeast, and it is traversed throughout its length by a mountain range, which forms part of the chain that bounds Thessaly on the east, and is continued south of Euboia in the lofty islands of Andros, Tinos and Mykonos. It forms most of the regional unit of Euboea, which also includes Skyros and a small area of the Greek mainland. Like most of the Greek islands, Euboea was known by other names in antiquity, such as Macris (Μάκρις) and Doliche (Δολίχη) from its elongated shape, or Ellopia, Aonia and Abantis from the tribes inhabiting it. Its ancient and current name, Εὔβοια, derives from the words εὖ "good", and βοῦς "ox", meaning "(the land of) the well(-fed) oxen". In the Middle Ages, the island was often referred to by Byzantine authors by the name of its capital, Chalcis (Χαλκίς) or Euripos (Εὔριπος,) the name of the strait that separates the island from the Greek mainland. Although the ancient name Euboea remained in use by classicizing authors until the 16th century. The phrase στὸν Εὔριπον 'to Evripos', rebracketed as στὸ Νεὔριπον 'to Nevripos', became Negroponte ("Black Bridge") in Italian by folk etymology, the ponte 'bridge' being interpreted as the bridge of Chalcis. This name was most relevant when the island was under Venetian rule. That name entered common use in the West in the 13th century, with other variants being Egripons, Negripo, and Negropont. Under Ottoman rule, the island and its capital were known as Eğriboz or Ağriboz, again after the Euripos strait. Euboea was believed to have originally formed part of the mainland, and to have been separated from it by an earthquake.