Mikkel Larsen(Michael Larson)-Oline Larson-Wiscons

Hello, I am trying to find out how these two are related to my family. In Sauk County Wisconsin, my family, Bernt Anderson (bernt Andersen) 1838-1910 and his wife Karen M Anderson(Karen Matea Kristiansdatter) 1849-1923, are buried here along with some of their children. With them, is Michael Larson and his wife Oline Larson. This is all I have to go on from someone who was telling me how he came across Michael Larson.... "I found his name in my great grandfather's (Ludwig Forseth, ) Norwegian Bible as Mikkel Larsen, Födt. 1831, Döde. 1901, Begravet på. Big Hollow. My mother thought he was a cousin or uncle of Ludwig's. I know nothing about Ludwig's father other than his name Abraham Larsen. Michael is most likely a younger brother of Abraham. Ludwig also was born in Eidsvold, Akerhus, Norway and changed his last name from Abrahamson to Forseth when he came to the US in 1889" Any assistance as to helping me find how Michael and Oline are related to me. Thank you :):)