David and 'Daarthe' are mentioned twice on the page you've referenced. Once for their engagement - the second for their marriage.
The words in front of her name on each are different -- the first is Enken the second is og.
They are in the helpful list here - http://home.online.no/~otjoerge/files/word.htm
The pages which include the son's birth/baptism do not list the mother's names at all. Check the other entries - you'll see that in the pattern of the records.
The second column might be understood better by people who commonly research in that area. As this church was located in Buskerud - the message board for Buskerud might better find such specialists.