Lovendahl- Boman -Jonsson

I am searching these surnames. All three are from my Mom's side. My Great Grandmother's family were from (Jon?) Jonsson, married to the Boman family. Ida Christine Boman married (John) Conrad Lovendale (U.S. spelling). Children were: Helena, Olga, Alma, Amanda, and John, my Grandfather. They came through Boston circa 1888. All but my Grandfather were born in Sweden, he was born in Fosbekk (SP?) Norway. I have the family history from the U.S., but nothing before they arrived in Boston. Any help would be greatly appreciated!! Betsy in Maine