Larsdotter-Helgeson

I am looking for information on Madela Larsdotter and Endre Helgeson. She was 37 when they came over in 1866. They had the following children: Lars 12, Berthe 4, and Helge 1. She had a sister Ingeborg who immigrated at the same time with her 2 children. They also had a brother or sister named Gjær that was born in 1833 and immigrated in 1858. I believe they were from the Haugesund area. Tami