Anders Peterson (Pedersen) - Olga

Her birth and death https://www.familysearch.org/ark:/61903/1:1:XLF4-G3V https://www.familysearch.org/ark:/61903/1:1:XLF4-G3V

Gilbert Peterson was born 8 April 1886. So Olga born in June could not be his sister.

You will find a Andrew and Anne Pederson in the 1905 census for Elk Mound WI. They have a daughter named Olga born 1888. I suspect this is that family and they named the next child Olga since the first Olga died.

My Anders Pedersen, later named Andrew Peterson lived in Barronette Wisconsin, where my grandfather was born and then the family moved to Winton Minnesota in about 1899.

Olga Elise Peterson born 14 June 1888, Elk Mound, Dunn, Wisconsin, parents Andrew Peterson and Anne Olson.
Again not my Andrew as my grandfather Melvin was born 11 January 1888.

Gilbert is born Apr 8 1885, not 1886, but I have temporary disconnected Olga Mathilde Peterson who died only 11 months old.

Originally I had Gilbert born in 1885 but his 31 July 1886 baptism record shows 8 April 1886, 1900 census shows April 1886, WWI Draft Registration shows 8 April 1886, WWII Draft Registration shows 8 April 1886, Idaho Death Record shows 8 April 1886.
John

Anne Hermansen's father was Herman Olsen from Torpo so early records have her last name as Hermansen, later records with information provided by her children list her last name as Olson.
Anne and Anders had 8 children that lived to be adults but on her death certificate it says she had 12 kids. So I am certain they had other children that died young like Olga. But I do not think Olga was one of them.
John

Gilbert's baptism records lists his mother as Anne Hermansen as I see it but someone transcribed it as "Stemmer".