No record of the marriage has been located in the Church records of the Baton Rouge or New Orleans dioceses. Civil records of St. James and Ascension Parishes have also been searched unsuccessfully. The date can be closely bracketed (see below), but the place can only be guessed at.
Children of Pierre Lanoux & Catherine LeBlanc were presented for baptism in 1771, 1773, 1775, & 1777, indicating that the couple was married by 1771.