Osceola County Iowa Unknown family

Can you identify this Unknown Family?

This picture was inherited after contributor's mother passed away in 1990. Can anyone identify the family? The photo was taken by the Harrington Studios, Sheldon, Iowa possibly in the late 1890s/early 1900s. Possible ancestral lines may be Brummer or Odenga. The woman, to contributor, looks like she could be an Odenga. Other family names are possible too, but those are the primary ones. She has no idea who they are, but would really like to know.

Osceola County Iowa Genealogy - The IAGenWeb Project