I found Veronique Dugas, eldest daughter of Napoleon Dugas and Augustine Boulanger, in the 1930 Lafayette Parish census. She was married to Armand Dugas, son of Jules Oliver Dugas and Eugenie Constant. Veronique and Armand had five children; Beatrice, Curley, Winnie, Verna and Jules. See 1930 census roll 797, page 96B. The family lived at 105 Sampson Street in Lafayette.
I have not been able to find any of the other siblings after the 1910 census where they show up with their mother and stepfather, Caliste Stelly. All of the children are listed as "Stelly" rather than Dugas.