I found Hellen Rode (my GGM) died 12/12/07 in Chicago. She lived with her husband, Frank (we think, maybe Franz) at 3015 S. Pitney Court in 1907. They both were born in Germany, but we have not found their marriage. We think her maiden name was Loga. She was 36 when she died.
Her children were Julia (my GM), John, Helen, Celia and Anthony. I think I found John and Helen living with a John and Annie Meyer in the 1910 Census. They are listed as "son and daughter" except Annie's census form says she has had "0" children. (COOK, Roll 275, Book 2, Page 96.)
My theory is after my GGM died, the kids were parceled out and Annie was either a sister of my GGM or GGF.
So Anthony, Julia and Cecia remain missing. My grandmother (Julia) claimed her last name was "Rak" (pronounced "Rock" allegedly) when she was married in 1920, so my guess is that is who she was living with. When she had a child in 1922, she claimed her maiden name was "Rohde."
I never found them at all in 1900 census or in any immigration records.