Barbro Guttormsdatter Brenden left the parish for America in April of 1866:
Kildeinformasjon: Mangler fylkesnavn fylke, , Error, nonexisting localization reference! nr. (-), Inn- og utflyttede 1866-1867, side 259.
The date of birth is shown (5 Mar 1835). This is definately "your" Barbro. She is traveling with the people mentioned abover her. #2, Ragnhild Guttormsdatter, is her sister.
The 1865 census shows them all living together at a farm called "Bakken".http://digitalarkivet.no/cgi-win/webcens.exe?slag=visbase&am...
Note that Barbro Guttormsdatter is listed as a widow. I can't find a marriage record, and she is listed as a "maiden" and not a widow whe she left the parish, so she may not have been married before she left Norway.