SÃÂndÃÂo (), also known as Sanyu () and Sanshu (; ), were a collection of a prehispanic Philippine polities recorded in Chinese annals as a nation occupying the islands of (present-day Calamian), (present-day Palawan), and (possibly Pulilan, near present-day Manila). In the Chinese Gazetteer the Zhà «fÃÂn zhì 諸èÂÂå¿ (1225), they were described as tributary states of the more powerful nation of Ma-i () centered in nearby Mindoro.
They described Sandao as thus:
Sandao remained tributary states of Ma-i until its territories were invaded by Sulu and Brunei marking the end of their independence.