I have an Amos Guerin born in LaPrairie, Quebec in 1840. I also have a Joseph born about 1842 same place, baptized St Phillipe's in LaPrairie. Joseph's parents are listed as Jacques Guerin and ?Florence DuBois (from ancestry.com's copy of Drouin Collection). I do not read French very well and it is a hazy copy. I think that there is a grandfather listed, Joseph Guerin, perhaps as a godparent.
I have Amos and Joseph in Ogdensburg NY operating a boat yard around 1890's. They had been there for many years.

Amos married Maryann McDonald from Brockville, Ontario, Canada. Not sure if married in US or Canada. Their children all born in US in Ogdensburg are:
1. Sophia 1862
2. Mary 1864
3. Fannie 1865
4. John 1867
5. George 1869
6. Angeline 1870
7. Elizabeth 1872
8. William 1874
9. Harriet 1877
10. Agnes 1880- We have this line.

Maryann died 1893 in Ogdensburg

I think that Joseph was his brother as they were close in age and born in the same place but no proof. Could not find a listing on Ancestry although Joseph's came right up. Could be that they were cousins. Most info taken from 1880 census

Agnes, #10, was my husband's grandmother. She married twice, I have this information, and died in Pompton Lakes, NJ in 1958.

I would love to have Amos' parents information and if Joseph was his brother and if there are any other siblings.

Janet Morgan