I think you search about Henry Jeffery(1811)born in Yarmouth Co Norfolk England married with Zoe Ouellet(1822) en 1841 (Ste-Anne, Kamouraska). They have a child, Auguste born in 1851 maried with Heloise Lebel. We lost this family at the first generation. Sometime the census employees write what they listen not the real name.I think they can mix Elisa and Heloise.If you want, we can exchange information to complete family tree. We miss information about four people who emigrate in the USA at the same period.