Ellen Stenersdatter Gullickson

Unfortunately I'm not very good at searching in the different Norwegian databases, so I'm hoping some of you that are, can help me out (again). In my research I believe my third great-grandmother was Ellen Stenersdatter Gullickson born in Norway about 1840. She had to have emigrated prior to October of 1865 because she married my third great-grandfather Neils Ellefsen in Minnesota at that time. I don't have any further information on her, and I'd like to find at least her parents and when/how she came to the United States. Any help is appreciated. Neils Ellefson Birth 15 JUN 1816 • Tanum, Brunlanes, Vestfold, Norway, but since they married in the U.S. I don't know if that will help.