Jennie Eng

My grandmother, Jennie Eng, was born 29 May 1885 in Hernes Elverum, Norway. She married John Borreson in Yankton, South Dakota on 7 Jul 1913. The 1920 Census says she immigrated in 1909. My mother always talked of her going to Canada with a brother Ole before coming to America alone. All documentation I've seen lists her surname as "Eng" though I do have a photo of a relative perhaps that's noted as Pauline "Engen." I am having no luck finding her in the 1910 census in the U.S. or in any of the Norwegian censuses (though I admit to being useless in my Norwegian language skills!). Any suggestiions?