Andrew of Phu Yen was a 17th-century Vietnamese catechist who served as a dedicated assistant to Jesuit missionaries. Born in the province of Phú Yên, he was baptized in 1641 and eventually joined the Maison Dieu, an association of catechists committed to supporting priests and spreading the Gospel. During a period of intense religious persecution in the region, he was arrested by authorities and refused to renounce his Catholic faith. He is remembered as the protomartyr of Vietnam due to his steadfastness and ultimate death for his religious convictions.