Church record not found

I have a typed family tree done by a relative about 1972. In it she has a Knut Tolleivson who married Rangdi Olsdatter Hoime Knut supposedly died in 1701 in Vestre Slidre, Oppland. I can't find a church record as they don't go back that far. How would this woman has found this information about Knut and all his children being born starting about 1673? Perhaps I am missing a resource that she had but I don't believe she even had the Internet.