Joseph Marchand was a French Catholic priest and missionary belonging to the Paris Foreign Missions Society. Born in Passavant in 1803, he traveled to Asia at age 25 to pursue evangelization. During his time in Vietnam, he became involved in the Lê Văn Khôi revolt, an uprising aimed at replacing Emperor Minh Mạng with a Catholic ruler. Following his arrest for ties to this rebellion, he was executed in Huế in 1835, where he died a martyr.