Piang Tan (1846–1933) a Chinese Maguindanaon ruler, popularly known as Datu Piang, is often referred to as the Grand Old Man of Cotabato. Born of a Chinese merchant named Tuya Tan (陳名頓) 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 (sometimes referred to as Amai Mingka) 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".