My paternal great great grandparents were Alexis Martin and Henriette Couture.
My father was Nelson Afred Martin, his father was Frederick Nelson Martin, his father was Nelson Martin and his parents were Alexis Martin and Henriette Couture.
I found multiple entries in the Keeseville, NY church records on Alexis and Henriette as a couple but no record of marriage or death.
Lots of luck. There are multiple Alexis Martins and I'm never sure which one I dealing w/at any particular time.
Have these two shown up in your research?