Isaac married Perpétue Hubou-Tourville. Perpétue (daughter of Jean-Baptiste Hubou-Tourville and Rosalie Blot) was born on 22 Jun 1820 in Rivière-des-Prairies, Montréal, Québec, Canada; died about 1853. [Group Sheet]

1. Matilda Robillard was born on 12 May 1839 in South Hero, Grand Isle, Vermont, USA; died on 13 May 1903 in South Hero, Grand Isle, Vermont, USA.
2. Gertha Robillard was born on 10 Mar 1844 in South Hero, Grand Isle, Vermont, USA; died on 30 Nov 1931 in South Hero, Grand Isle, Vermont, USA.
3. Laura Robillard was born about 14 Jan 1846 in South Hero, Grand Isle, Vermont, USA.
4. Seymour Robillard was born on 16 Dec 1847 in South Hero, Grand Isle, Vermont, USA; died on 16 Dec 1918 in South Hero, Grand Isle, Vermont, USA.
5. Joseph Robillard was born on 14 Oct 1849 in Plattsburgh, Clinton, New York, USA; died on 27 Jul 1938 in Essex Junction, Vermont, USA.
6. Margaret Robillard was born about 1852 in South Hero, Grand Isle, Vermont, USA.

Isaac married Thirza Larose on 21 May 1855 in Burlington, Chittenden County, Vermont, USA. [Group Sheet]

Pierre married Thérèse Riel on 1 Aug 1814 in Lavaltrie, Québec, Canada. [Group Sheet]