St. Peter Almató Ribera († 1861) was a Spanish Dominican priest and martyr who joined the Dominican Order and was sent as a missionary to Vietnam. He was martyred in 1861 during the anti-Christian persecutions under Emperor Tự Đức, beheaded for his faith in Tonkin (modern-day Vietnam). He is one of the Vietnamese Martyrs, canonized by Pope John Paul II in 1988. His feast day is November 24, celebrated with the Vietnamese Martyrs.
St. Valentine Berrio-Ochoa († 1861) was a Dominican priest and missionary who became the Bishop of Tonkin, Vietnam. He was martyred by beheading in 1861 alongside other missionaries, including Peter Almató, during the same persecutions. He is also one of the Vietnamese Martyrs, canonized in 1988, with a feast day on November 24.
St. Thomas Toan (†1861), also known as Thomas Nguyễn Văn Thiện, was a native Vietnamese catechist who worked to spread the Catholic faith. Arrested during the persecutions, he faced pressure to apostatize but repented his initial weakness and remained steadfast. He was flogged and left to die of exposure in 1840. He is one of the Vietnamese Martyrs, canonized in 1988, with a feast day on November 24.