Searhing for Kari Ballangrud of Jevnaker, Oppland

I hve spent considerable time searching for this Kari (?) Ballangrud and would appreciate any help available in identifying her. 1. Supposedly she is the first wife of Pål (Povel) Henriksen. Pål's second wife is Marte Olsdtr. Løcheneje g. 1757. 2. Supposedly she is the mother of Elen Povelsen Ballangrud born abt 1742 (74 aar in 1816 when he died and 59 aar in the 1801 census) and Anders Povelsen Ballangrud born abt 1745/46 (75 aar in 1830 when he died and 55 in the 1801 census. 3. Therefore I assume that Pål and Kari were married prior to 1742 and that she died prior to 1757. 4. I believe that Pål's father is Henrik Kristensen (1681) is from Børmarken in Gran and his grandfather is Kristen Henriksen. (1651) also from Børmarken. 5. I cannot find the marriage date for Kari or the birth dates for Elen or Anders in Jevnaker or Gran parish records. Any help would be greatly appreciated. Thanks, Gene Nelson-Stillwater, MN. USA