Here's what I was able to find on your grandmother's family:
Children of Evariste ROBIN and Amelina BOUDREAUX:
1) Joseph Edouard ROBIN b. 25 Jan 1868 (GC Ch, v.3, p.5) 2) Marie Celima ROBIN b. 22 Sep 1869 (GC Ch, v.3, p.28) 3) Joseph Valmont ROBIN b. 5 Oct 1871 (GC Ch, v.3, p.55) 4) Marie Mathilde ROBIN b. 8 Feb 1874 (GC Ch, v.3, p.87) 5) Joseph Evariste ROBIN b. 22 Nov 1875 (GC Ch, v.3, p.103) 6) Edouard ROBIN b. 23 Sep 1877 (GC Ch, v.3, p.122) 7) Francois ROBIN b. 4 Oct 1880 (GC Ch, v.3, p.152) 8) Marie Brigitte ROBIN b. 13 Sep 1882 (GC Ch, v.3, p.172)
The source info is from Southwest Louisiana Records (SWLR). "GC Ch" is Grand Coteau Church.