Studied at seminaries in Melan, then Chambery in France in 1819. Member of the Society of Foreign Missions of Paris. Priest. Missionary to Cochin-China in 1824, Macao in 1825, and Tonkin in 1826. He was arrested more than once for preaching Christianity, he was pardoned because of his skill as a translator, which was useful to the king. However, he gained too many converts, and in 1838 he was arrested, tortured and murdered for his faith. One of the Martyrs of Vietnam.
- strangled to death on 21 September 1838 in Nhan Bieu, Quang Tri, Tonkin, Indo-China (modern Vietnam)
- buried near Tonkin by local Christians
- later moved to the Seminary for Foreign Missions, Paris, France
- “Saint François Jaccard“. CatholicSaints.Info. 21 September 2008. Web. 7 July 2015. <>