Hi, First lets correct some errors on your Data. George was the son of Théophile and Julie Larivière dit Chapdelaine. Grandson of Jacques and Catherine Thérèse Cotnoir dit Menoche.
Second I have four other sibblings on my records.
1) Mathilde married to Antoine Cotnoir on 13 nov 1877 in St-Aimé, Massueville, Richelieu, Quebec, Canada 2) Pierre married to Octavie Durocheron 22 oct 1883 in St-Aimé, Massueville... 3) Théophile married to Rosilda Valois 26 nov 1894, St-Aimé, with two daughters, Cécile-Blanche and Imelda. 4) Napoléon born 17 sep 1874, St-Aimé, First marriage to Délia Tousignant on 18 nov 1893 in St.Denis Church, East Douglas, MA. Second marriage to Délia Provencher on 20 apr 1924, St.Andre, Biddeford, Maine
For your information this branch of Lamontagne is Rausch Branch, i.e. descendant of Jospeh Rausch of Innsbruck, Austria, a german soldier that fouth the American War of independance for the British. Joseph Rausch dit Lamontagnemarried Marie-Madeleine Geneviève Giguère on the 9 feb 1789 in St-Michel, Yamaska, Qc, Can