He was a founding member of the Paris Foreign Missions Society and became a missionary in Asia.

Born in Brignoles, Var, Cotolendi was recruited by Alexander de Rhodes, SJ, as a secular clergy volunteer to become a missionary in Asia, together with François Pallu and Pierre Lambert de la Motte.

[1][2][3] In 1660 Ignace Cotolendi was nominated as titular Bishop of Metellopolis and Vicar Apostolic of Nanjing,[4] with three regions of northeastern China, Tartary and Korea under his responsibility.

The three bishops left France (1660–62) to go to their respective missions, and crossed Persia and India on foot, since Portugal would have refused to take non-Padroado missionaries by ship, and the Dutch and the English refused to take Catholic missionaries.

[8] After travelling overland to India, Ignace Cotolendi died near Masulipatam as he was waiting for his passage to Siam.