The people of Malawi belong mainly to various Central Bantu groups. About half belong to the Chewa and Nyanja groups, known collectively as Malawi (or Maravi) before the 19th century. About 15% are Lomwe (Alomwe), who live south of Lake Chilwa. Other indigenous Malawians include the Tumbuko, Tonga, and Ngonde. The Ngoni and Yao arrived in the 19th century; together they constitute about 15% of the population. There are a few thousand Europeans, mainly of British origin, including descendants of Scottish missionaries. There are also small numbers of Portuguese, Asians (mainly Indians), and persons of mixed ancestry.