PINSONNEAULT, Peter Adolphus, Canadian R. C. bishop, born in Montreal, Canada, in 1815; died in Canada in 1883. He studied in the College of Montreal with the intention of becoming a lawyer, but, resolving to become a priest, went to Paris, studied theology in the College of St. Sulpice, entered the Sulpitian order, and was ordained in 1840. He exercised his ministry in Montreal, on his return, until 1856, when he was consecrated bishop of the newly erected diocese of London, Ont. He removed to Sandwich in 1859, and obtained the alteration of the name of the diocese to Sandwich. He resigned in 1867, and lived principally in Montreal, where he rendered great services to the bishop. He published a work in favor of the infallibility of the pope (1870).