I'm not sure if your still out there, but my great grandfather was Jacob Kamm b. 1862 in Lemberg, Galicia d. 1944 in Chicago, Il he was married to Minnie Dobriner they had 5 children.
Richard, Fannie, Rosie, Margaret (my grandma) and Salo
Could this be the same Jacob you're looking for?
My email is firstname.lastname@example.org