I don't have Joseph David Rocheleau's siblings. He was my g grandfather too. However, I do have his ancestry. Going way back. His parents were:
Joseph Rocheleau and Luce dit Virginie Plante. This Joseph was born c. 1827 in St. Melanie, QC They married 4/17/1849. This family was from St. Gabriel de Brandon, Provence of QC, Canada which is northeast of Montreal.
Joseph David Rocheleau b. 11/24/1851 in St. Gabriel de Brandon, Provence of Quebec, Canada.He married Emelia Coutu b. 3/10/1864in St. Melanie, QC