This information may help. My name's Brett Robert Ewald, i live in Minnesota.My grandfather, Robert Francis EWALD, was born in Detroit, Michigan in 1923.His father, John James EWALD, was also born in Detroit in 1899.His father, Jacob EWALD, came to Detroit in the late 1800's from Germany.
I don't know if your Cazmir EWALD's father could be my Jacob EWALD or maybe a brother/ cousin of Jacob.
I Hope this did help you.If you do find a connection between us, or any history of EWALD's in Detroit, please e-mail me. Good luck and Thanks.