I've been very busy comparing all your entries here, and have worked up a spreadsheet, trying to get all the data lined up for Samuel Harriman and wife Marie Angelique Lecouffe. So far, here are a few notes: Witness for their marriage was John M. McKay. Elizabeth, born 1839, is also called Betsey. Mary, born 1839 (could have been a twin), died about age 8 and is buried in a little plot on the family farm. 'Jean' Harriman, born 1857, was thought to be female, is male John. Genevieve, born 1859, is also called Zelpha, Zelphia, Jane, and Sylvia. All the same person. Samuel Lee Harriman, the father, is buried in the plot on the family farm, with his daughter.
As for the crossover from Catholic to Presbyterian, the story my ancestor wrote stated that the reason for that was that the Catholic church was very hard to get to most of the year, and the Presbyterian church was much closer. So, the kids switched over.
Kudos for the person who posted all the wonderful resources for all the kids. That was an amazing amount of help for me. I will try to clean up my spreadsheet and then will post that information in the next few days.