Albertine Joachime Petrona Rønne, Minnesota

I'm seeking information on the Norway couple Albertine and her husband Peter Andreas Olsen Ingstad. She was born April 24, 1831 and died in Hennepin, Minnesota on December 7, 1910. Peter was born 1830. Death unknown. If Albertine kept her Rønne name it most likely and quickly converted to Ronne. Peter's family name was probably Engstad whcih most likely converted to Ingstad. I'd like to know if they had any children and if they divorced and eventually remarried. An other Rønne or Ronne, Bone Marcus born September 4, 1831 from Copenhagen, Denmark left without trace and died in America on April 11, 1891. I'd like to know as much as possible about him.