Thyrsa Dupont was born date unknown, and died date unknown.She married Alphonse Denoncourt on 18 Jan 1881 in St-Gregoire, Nicolet, QC, Canada, son of Moise Denoncourt and Marguerite Boudreau. More About Thyrsa Dupont and Alphonse Denoncourt: Marriage: 18 Jan 1881, St-Gregoire, Nicolet, QC, Canada.