The Isle of Skye, or simply Skye (, Scottish Gaelic: An t-Eilean Sgitheanach or Eilean a' Che, Scots: Isle o Skye), is the largest and northernmost of the major islands in the Inner Hebrides of Scotland. The island's peninsulas radiate from a mountainous hub dominated by the Cuillin, the rocky slopes of which provide some of the most dramatic mountain scenery in the country. Although it has been suggested that Sgitheanach describes a winged shape there is no definitive agreement as to the name's origins. The island has been occupied since the Mesolithic period, and its history includes a time of Pictish, Celtic and Norse rule and a long period of domination by Clan MacLeod and Clan Donald. The island was considered to be under Norwegian suzerainty until the 1266 Treaty of Perth which transferred control over to Scotland. The 18th-century Jacobite risings led to the breaking up of the clan system and later clearances that replaced entire communities with sheep farms, some of which involved forced emigrations to distant lands. Resident numbers declined from over 20, 000 in the early 19th century to just under 9, 000 by the closing decade of the 20th century. Skye's population increased by 4 per cent between 1991 and 2001. About a third of the residents were Gaelic speakers in 2001, and although their numbers are in decline, this aspect of island culture remains important. The main industries are tourism, agriculture, fishing and forestry. Skye is part of the Highland Council local government area.