https://www.yodisphere.com/2022/09/Mandaya-Tribe-Culture-Traditions-History.html
The origins of the Mandaya may be traced to the Indonesians who came to the Philippines in a series of immigration waves from 3000 to 500 BC, intermarried with the native women, and begot the Manobo of eastern Mindanao. The Malays who migrated to the Philippines between 300 to 200 BC through Palawan and Mindoro intermarried with the Manobo and begot the Mandaya. This Malay-Manobo union theory is based on similarities in ethnolinguistic patterns and the weaving technologies of the Mandaya and some Indonesian groups. The Chinese came in the 13th century and, through intermarriage, contributed further to the racial development of the Mandaya.