Of the five Alderson families listed in the 1880 census of Grant Co WI four were older couples who had no children in that period. The most likely parent is Ralph Alderson. He had a daughter listed as May M shown as age 1 in that census. This does not exactly agree with your data.The family had nine children, but I only have marriages for one son and one daughter. Several children died young according to the 1900 census. Ralph left his family at home and was working at the arsenal in Kenosha WI. He was killed there in an explosion.His widow Mary nee Carl was listed in the 1920 census in Kenosha. E-mail me at firstname.lastname@example.org for further information.