Pedro Calungsod, also known as Peter Calungsod and Pedro Calonsor, was a Catholic Filipino-Visayan migrant, sacristan and missionary catechist who, along with the Spanish Jesuit missionary Diego Luis de San Vitores, suffered religious persecution and martyrdom in Guam for their missionary work in 1672.

Visayans or Visayan people are a Philippine ethnolinguistic family group or metaethnicity native to the Visayas, the southernmost islands of Luzon and a significant portion of Mindanao. They are composed of numerous distinct ethnic groups, many unrelated to each other. When taken as a single group, they number around 33.5 million. The Visayans, like the Luzon Lowlanders were originally predominantly animist-polytheists and broadly share a maritime culture until the 16th century when Catholicism was introduced by the Spanish empire. In more inland or otherwise secluded areas, ancient animistic-polytheistic beliefs and traditions either were reinterpreted within a Roman Catholic framework or syncretized with the new religion. Visayans are generally speakers of one or more of the distinct Bisayan languages, the most widely spoken being Cebuano, followed by Hiligaynon (Ilonggo) and Waray-Waray.