Bennie Engen - Bennie Engen--Daughter

There's a lot of problems with that family, perhaps only details rather than structural but it's all over the place on the detail level which calls into question everything about it.

Eg Alfred Thorn Engen is born 31 March 1897 not 31 March 1887 as listed on Geni. It only takes a few minutes online to confirm: https://www.findagrave.com/memorial/64457653/alfred-engen or https://www.myheritage.com/research/record-10859-667360/alfred-enge...

Peter Nilsen Engen is listed on Geni as dying 24 May 1915 but the notes in his About clearly explain that he remarried in 1922 after Lisa Engen died in 1920, so either the date is wrong or they've conflated two different men.

So to your point, there's at least one child of Peder and Lisa named Bennie, a boy born 1908. But I cannot find the family in the 1900 census so it's not possible to rule out that there was a daughter named Bennie (1895-1906), according to the 1910 census Peder and Lisa had been married 18 years but the oldest child (Alfred) is 12 so there's a 6 year gap where earlier children could have been born.

Digging further I wonder what the source of the text in the About of Peder's profile is, it certainly seems that there two Peders being conflated and that the husband of Lisa did indeed die 1915 so cannot have remarried and had a son in 1922.

The gravestone of Lisa and Peder match in style and look to be next to each other so extremely unlikely that they are mistaken https://www.findagrave.com/memorial/64457564/peter-engen https://www.findagrave.com/memorial/64457578/lisa-engen

If both Peder and Lisa are dead by the time of the letter that is a more obvious explanation why the children are scattered among other family.

Yes, god bless mothers! There's nothing more frustrating than a wonderful old photo but having no idea who is in it. I have had mixed success with posting old photos on Geni and teaming up to identify the subjects, still a cupboard full of photos to go.