The Tagalog people (mga Tagalog) are the largest ethnolinguistic group in the Philippines. An Austronesian people, the Tagalogs are native to the Metro Manila and Calabarzon regions of southern Luzon, and comprise the majority in the provinces of Bulacan, Bataan, Nueva Ecija and Aurora in Central Luzon and in the islands of Marinduque and Mindoro in Mimaropa.
The commonly perpetuated origin for the endonym "Tagalog" is the term tagá-ilog, which means "people from [along] the river" (the prefix tagá- meaning "coming from" or "native of"). However, this explanation is a mistranslation of the correct term tagá-álog, which means "people from the ford".
Before the colonial period, the term "Tagalog" was originally used to differentiate river dwellers (taga-ilog) from mountain dwellers (taga-bundok, less common tingues) between Nagcarlan and Lamon Bay, despite speaking the same language. Further exceptions include the present-day Batangas Tagalogs, who referred to themselves as people of Kumintang - a distinction formally maintained throughout the colonial period.
Allegiance to a bayan differentiated between its natives called tawo and foreigners, who either also spoke Tagalog or other languages - the latter called samot or samok.
Beginning in the Spanish colonial period, documented foreign spellings of the term ranged from Tagalos to Tagalor.
History of Manila and History of Luzon
Like the majority of Filipinos, the Tagalog people primarily descend from seafaring Austronesians who migrated southwards to the Philippine islands from the island of Taiwan some 4,000 years ago. This means that the Tagalogs, like virtually all other Filipinos, are related to the Austronesian-speaking peoples of present-day Taiwan, Malaysia, Brunei, Indonesia, and the more distant Micronesians, Polynesians, and Malagasy. Contact with the much earlier arrived Negritos resulted in a gradually developed scenario seen throughout the Philippine archipelago of coastal, lowland, predominantly Austronesian-speaking seafaring settlements and land-based Negrito hunter-gatherers confined to forested and mountainous inlands, along with inland Austronesians oriented towards rivers.