Johansen of Røyken

In 1881, Edvard B Johansen (b. 1-14-1841 Røyken) emigrated to La Crosse, WI, USA with his much younger brother Thorvald (b. 9-26-1862 Røyken) . With the specification of La Crosse, WI as the destination, it leads me to believe that they had other family members in the area already. However, I can't find anyone who had come over before that. Edvard and Thorvald had several siblings that I can't seem to find any information about beyond birth records, so I am hoping that if I can get a bit more on them that I might find my connection. Does anyone have any information about any of the following? Death records, marriage records, children? Anything would be helpful! Parents are Johan Pedersen b. 8-25-1818 Røyken and Anne Jørgine Svendsdatter b. 9-19-1818 Asker Siblings are: - Maren Sorine Johansdatter b. 2-12-1843 Røyken - Pernille Johansdatter b. 2-26-1845 b. 2-28-1848 Røyken - Lovise Johansdatter b. 2-28-1848 Røyken - Christian Johansen b. 2-28-1848 Røyken - Julia Johansen b. 1851 - Anette Johansdatter b. 3-1-1854 Røyken - Pouline Johansdatter b. 10-14-1857 Røyken - Martine Johansdatter b. 5-13-1860 Røyken Thanks so much for any help!