Pedro Calungsod was a Visayan teenaged catechist — almost certainly from Cebu, possibly from Leyte (precise birthplace uncertain) — who in 1668 joined the Jesuit mission of Diego Luis de San Vitores to the Mariana Islands at fourteen. Pedro was a lay catechist, not a religious; his role was to assist San Vitores in the catechesis of Chamorro children and women.
The Jesuit mission to Guam encountered resistance from a faction of the local Chamorro society led by a Chinese-Chamorro shaman named Choco, who propagated the rumour that the water of baptism was poisoned and was responsible for infant deaths. Tensions came to a head when San Vitores and Pedro Calungsod baptized the daughter of a local chieftain named Mata'pang without his consent — though with his absent wife's consent. Mata'pang, with a fellow warrior named Hirao, attacked the two on the morning of April 2, 1672, at Tomhom Bay (modern Tumon).
Pedro Calungsod — eighteen years old, unarmed, with the agility to escape — chose to remain with San Vitores. He was killed first by a spear thrust through the chest and a machete-cut to the head; San Vitores knelt beside him to absolve him and was killed seconds later. The two bodies were tied together and thrown into the sea. Beatified in 2000 by John Paul II; canonized 2012 — the second Filipino saint after Lawrence Ruiz.