Williamsen on Family Tree Circles

Looking for any family information on Kronberg from around Washington County NE. Olaf Kronberg came from Sweden I believe he married a Mithilda Monson and had a son named Gus which presided in Nebraska.

Looking for family of William Alley who married Maddie Britian. had a son name Lyle Alley from Iowa. May be a distant relative of John Adams??

Looking for the family of Gilbert Theodore Williamsen of Nebraska. He married Rhoda Kempke. His father's name was Theodore Williamsen or Wilhelmsen(may have changed name as baptism states Wilhelmsen for Gilbert).
Mother's name is Stella Christiansen. His grandparents were Peter and Marie from Sweden.