There are three languages known as Tagbawan: Aborlan Tagbanwa, Calamian Tagbanwa and Central Tagbanwa, and they are spoken in Palawan in the Philippines. They belong to the Philippine branch of the Malayo-Polynesian language family, and are not mutually intelligible. Calamian Tagbanwa has about 10,000 speakers, Central Tagbanwa has about 2,000 speakers, and Aborland Tagbanwa has about 10,000 speakers.
The Tagbanwa alphabet was used until the 17th century, and is closely related to Baybayin. It is thought to have descended from the Kawi script of Java, Bali and Sumatra, which in turn descended from the Pallava script, one of the southern Indian scripts derived from Brahmi.
Supplied by Wolfgang Kuhl
Information about the Tagbanwa alphabet and languages
Information about Philippine history, language, writing, etc
An introduction to the alphabets of the Philippines by Hector Santos