I just found this on a Gilbert DeBlanc (died at age 23. Parents Alcibiades DeBlanc: d. Nov 8, 1883; m. Mathilde Briant: d. June 4, 1892; daughter of Judge Piere Paul Briant ( born Feb 21, 1776; d. July 22, 1853) and Francoise Arsene Severgnes ( B. 1790; d. Setp 30, 1826: St. Martinville, LA. Children of Alcibiades and Mathilde were: Derneville DeBlanc, Gilbert DeBlanc, Adrienne DeBlanc, Corinne DeBlanc, Raphael Deblanc, Daniel DeBlanc, Mathilde DeBlanc, Jefferson DeBlanc and Jacques Maurice DeBlanc. If this is your family I have more info on the siblings and their spouses and offspring. I have nothing more on Gilbert or who he married.