Your post is very interesting. However, I can't help you much as I haven't been able to find much on the SCHICKOUFSKY line other that what was posted on my previous message and at Worldconnect on the rootsweb web site.
I did notice that the surname GHERKE is close to the spelling of my Fred Schickoufsky's mother-in-law Henrietta (GERDES) Remmers.
According to the 1925 Iowa State Census, Fred Schickousfsky came from East Prussia.
Do you have any more information on Wilhelmina and Elizabeth Schizkoski such as dates of Birth/death, place of birth/death and etc.