Datu Piang
Piang Tan a Chinese Maguindanaon ruler, popularly known as Datu Piang, is the founder of the royal House of Piang and often referred to as the Grand Old Man of Cotabato.
Born of a Chinese merchant named Tuya Tan from Amoy, China and a Maguindanaon woman named Tiko, he was Datu Utto's Minister of Lands and became the wealthiest and the most prominent datu during the American era. He was a Chinese mestizo due to his Maguindanao and Chinese mixture. Datu Piang was recognised as the undisputed Moro leader in Central Mindanao when the United States Army occupied and administered what was then referred to as "Moroland".
Datu Piang's son by his sixth wife, Polindao, was Datu Gumbay Piang, who led the Moro-Bolo Battalion to fight against the Japanese during their occupation of Mindanao in World War II.
