Who were Maren Marie Dahl's (1828 - 1915) parents

Due to some wonderfully helpful people I have found the places that 3 of my Norwegian grandparents, and their parents and grandparents lived in Norway. I’m going to visit Norway this fall for a month, and want to find out where the 4th person's parents and grandparents lived so I can also visit that place. I am afraid that the information I put on ancestry about Maren’s parents and grandparents is wrong. This is what I know about Maren when she lived in Norway: Maren Marie Dahl (1828–1915) ]lived at 0295 Gjetveiten, Trondhjem Sor-Trondelag, with her husband Jakob Jensen Nesvold. who was a master house painter. They were married in Domkirken 03 Aug 1848. I don’t know when they came to the US, because although their son Axel Ludvig Jacobsen Nesvold (1851-1910) came to the US in June 1868, I don’t see Maren or Jakob on the ship roster. They didn’t come before 1869 because they had a baby born that year in Trondheim. They eventually came to Chicago Illinois. Maren and Jakob had many children. I know about all the ones who came to Chicago and who they married, etc. but Maren Dahl’s past is still a mystery. Their children were: 1. Daughter Ida Marie Jacobsdatter Neswold 1849–1866 lived her whole life in Trondheim. 2. Son Jakob Axel my great grandfather was born in Trondheim but came to Chicago. 3. daughter Anna Bernharde Jacobsdatter (1852 – 1887) lived her whole life in Trondheim. 4. Daughter Maren Marie Neswold (1854 – 1937) eventually moved to Kristiansand, Norway. 5. Son Richard Christopher Knoff Jacobsen Naesvold (1855 – 1855) was a twin who died in Trondheim. 6. Son Jacob Magnus Jakobsen Neswold (1857 – 1899 ) also came to Chicago to live. 7. son Johannus (James) Jacobsen Neswold (1862-1924) was born in Trondheim but also came to Chicago to live. 8. daughter Nicoline Susanne Jac.sdatter (1864-1938) was born in Trondheim but came to Chicago to live. 9. daughter Olga Neswold (1836 – 1937) was born in Trondheim but came to Chicago to live. 10. daughter Ida Jacobsdatter Marie Neswold (1866) only lived a short while in Trondheim 11. daughter Ingeborg Anna Neswold was either born in 1860 or 1869 in Trondheim and died at some unknown time in Trondheim. 12. Walborg (Wally) Jacobsdatter Neswold (1869 – 1918) was born in Trondheim and came to Chicago to live. Thanks for any help you can provide!!!