Malays (Orang Melayu, Jawi: أورڠ ملايو) are an Austronesian ethnic group native to eastern Sumatra, the Malay Peninsula and coastal Borneo, as well as the smaller islands that lie between these locations. These locations are today part of the countries of Malaysia, Indonesia (eastern and southern Sumatra, Bangka Belitung Islands, West Kalimantan and Riau Islands), southern part of Thailand (Pattani, Satun, Songkhla, Yala and Narathiwat), Singapore and Brunei Darussalam.
There is considerable linguistic, cultural, artistic and social diversity among the many Malay subgroups, mainly due to hundreds of years of immigration and assimilation of various regional ethnicity and tribes within Maritime Southeast Asia. Historically, the Malay population is descended primarily from the earlier Malayic-speaking Austronesians and Austroasiatic tribes who founded several ancient maritime trading states and kingdoms, notably Brunei, Kedah, Langkasuka, Gangga Negara, Chi Tu, Nakhon Si Thammarat, Pahang, Melayu and Srivijaya.
The advent of the Malacca Sultanate in the 15th century triggered a major revolution in Malay history, the significance of which lies in its far-reaching political and cultural legacy. Common definitive markers of Malayness — the religion of Islam, the Malay language and traditions — are thought to have been promulgated during this era, resulting in the ethnogenesis of the Malay as a major ethnoreligious group in the region. In literature, architecture, culinary traditions, traditional dress, performing arts, martial arts and royal court traditions, Malacca set a standard that later Malay sultanates emulated. The golden age of the Malay sultanates in the Malay Peninsula, Sumatra and Borneo saw many of their inhabitants, particularly from various tribal communities like the Batak, Dayak, Orang Asli and the Orang Laut become subject to Islamisation and Malayisation.