Jean Derouet , a Roman Catholic missionary bishop, was of the Congregation of the Holy Ghost and of the Immaculate Heart of Mary, and titular Bishop of Camachus.
Ordained in 1891, he went as missionary to the Congo, and in 1904 was named pro-Vicar Apostolic of Loango.
He was chosen bishop on 19 December 1906; consecrated 3 February 1907, in the chapel of the Holy Ghost, at Paris; preconized on 18 April of the same year; and appointed Vicar Apostolic of Lower French Congo.