searching for great grandmothers family

I am looking for information on Erik Jonnsson 1813-1897 . My great great grand father. He married Kristianne Steffensdotter Bjordale 1824-1875. Kristianne came from a farm called Vollset which is close to Helset. Their daughter was Synnove Eriksdatter Jonsson. Synnove was born May 3 1856 and died April 3 1920. I am looking for any information on any of these people. Thanks