I know exactly about information not being passed down very well. I am going through some of the same problems on the other side of the family and with the country of Hunbary.
I have not contacte any family members. The reason being, is I am doing this out of a curiousity and out of that I feel that I need to know some of the history of the family. I never really knew the family, my dad stopped contact when he turned 18 and hasn't had contact since and he changed his last name when he was 21. I don't know if approaching would even go well.
Would the marriage record coming from the court that I requested have the church they were married in? I did request that, but have not contacted a church yet. I don't know if the kids were baptised, but if I knew a church that might help. Though it isn't necessarily going to be that they were baptised in the church they were married in.