Helena Maria Olsdatter or Eriksdatter

Looking for any information about Helena Olsdatter, who was married to Peder (Ole) Swedin-also spelled Swedeen. She was born March 28, 1836 in Norway and died December 23, 1900 in Dakota County, MN, USA. They were married before 1857 in Norway. A death record at Dakota County courthouse states her name as Helena Eriksdatter. Their children were: Anna Mathilde 3/5/1857, Emma before 1861, Johannes 6/6/1870, Ole 6/6/1870, Pater 12/15/1871, Ella before 1873, Henrietta 9/28/1874, Johannah 6/3/1876, Juline 6/3/1880, Alfred 10/15/1864 and Olivia 12/16/1859.