Looking for info of my Greatgrandfather, found them in the census for Pittsburgh, but cant find his German roots.

Hoerr, William, born July 1867 in Germany, came to america 1896-1897
Wilhelmina, (wife) born Oct 1869 in Germany, came to america 1891ish
", Helene, Sept 1899
", Katherina, 1901
", Wilhelm H., 1903 (Bill) owned a printing Press in PA
", Margretha, 1905
", Richard, 1907 (later changed to Richard Herr)
", Adeline, 1908