I just received a copy of my great-grandfathers Social security application. I now know my gr-gr-grandparents names.

John Zakrzewski & Mary Polanz (don't know if they ever came to the USA)
my gr-grandpa was born in Germany 1 Dec 1883. Married Helen Rutkowski.My Grandmother Wanda Zakrzewski (Saksewski) was born in Detroit, Mi 1906.
I don't know when Joseph came to America. I am now trying to get names of Joseph's siblings.