Ivy May Palmer and Raymond Palmer may or may not be brother and sister, I don't know. I do know they aren't related to me.
Those chairs are very similar, but it's not the same chair. Ivy May's photo was taken by Townsend Studio, Raymond's was taken by Sours Studio, both in Harvard, Nebraska.
If you are related to either Ivy May or Raymond Palmer, or maybe both, let me know. I'd be happy to get these photos to family.