I think we may be distant cousins. Bertha Kanis Kasten is buried in Wilmot Cemetery in SE Wisconsin. According to her tombstone, she was born 17 Dec 188? and died 16 Nov 1912. I have a photo of the tombstone, but it is not great.
My great grandfather was Johann (John G.) Kanis. According to the family bible, he had 2 brothers (William and Charles, probably Wilhelm and Karl). I believe William is the father of your Bertha. If this sounds like the right Bertha, I will review what I have and send it to you.