That is interesting. Were your ancestors Scottish by chance?
Your observation is probably right that the “faith” practiced in families is often determined by the mothers in families.
My husband, who was raised Catholic, is very active in our church.
My mother’s father and my father’s mother have scottish in their blood. Good for your husband. I think it is better for both parents to be active in which ever church they choose. It just makes it better. Same sort of thing with having two parents in the household (father and mother of course. :)