
"United States Census, 1910", , FamilySearch (https://www.familysearch.org/ark:/61903/1:1:M2LD-1PX : Tue Oct 03 22:51:27 UTC 2023), Entry for Olof Sunvold and Carrie Sunvold, 1910.
According to the 1910 census, Esther Knutson was the stepdaughter of Olaf Sundvall. Her biological father must have been a Knutson.
"United States, GenealogyBank Obituaries, Births, and Marriages 1980-2014", , FamilySearch (https://www.familysearch.org/ark:/61903/1:1:QKWC-Z12Z : Tue Oct 17 15:18:24 UTC 2023), Entry for Esther Knudson Hanks and Ingvald Knudson, 16 Aug 1992.
The obituary of Esther Knudson Hanks informs that her father's name was Ingvald Knudson.
I have found Esther and her parents in the 1905 census in Roosevelt, Beltrami, Minnesota.
"Minnesota State Census, 1905", , FamilySearch (https://www.familysearch.org/ark:/61903/1:1:SPS8-KHM : Thu Oct 05 19:39:42 UTC 2023), Entry for Ingvald Knudtson, 1905.
Ingvald Knudtson 23 Born in Norway Day Labourer
Carrie Knudtson 22 Born in Minn
Esther Knudtson 1 Born in Minn
One of the neighbours is Ole Sundvold - the man who later became Esther's stepfather?