I have hit a dead-end with my research on one line. I have an ancestor whose first name, married surname, birthdate, death date, children's names are all known to me but, I am unable to locate her parents' names.

Her married name is Severine Olsen, born in 1844 in Stavanger, Rogaland, Norway. She married Tollef Olsen and died in 1929 in Oregon. She has a daughter, Inga Olsen (my great-grandmother). I have no leads as to her parents' names. Her surname may be Gabrielsen but this is not verified, so I would not be surprised if it was not.

Can anyone help?