My Ollman Family - English Version

Here is my Ollman Family information. Any help is greatly appreciated.
My information says this family originated in Hannover.

William (Wilhelm) Ollman or Ollmann or Ohlmann - born January 1841
Hannover, died unknown in Illinois, USA, emigrated 1866 to Wisconsin,
USA,
            Wife: Caroline or Carlina or Carolina Runke - born May 1842
in Hannover, died unknown in Illinois, USA, emigrated 1866 to Wisconsin,
USA, married before emigration

            Children: William Ollman born 1866 in Hannover, died before
1880 in Wisconsin or Illinois, USA
                          Emma M. Ollman - born July 1869 in Wisconsin,
USA, died unknown Illinois, USA, married John Schuette on 18 March 1891
in Illinois, USA
                          Albert Henry Ollman - born 7 October 1871 in
Wisconsin, USA, died 30 August 1949 in Colorado, USA, married Mary
Sophia Runge on 13 June 1895 in Illinois.
                          Wilhelmina Louise Ollman - born 1873 in
Wisconsin, USA, died 31 January 1931 in Illinois, USA, married Reuben
Baker on 9 Sepetmber 1891 in Illinois.
                          Henry Ollman - born 26 March 1875 Wisconsin,
died April 1971 Wisconsin, USA, married Minnie about 1899 in Illinois,
USA.
                          Lydia Louise Ollman - born February 1877 in
Wisconsin, died unknown, married Gottfried Christopher Stecher on 9 June
1897 in Illinois, USA
                          Alice Olive Ollman - born April 1879
Wisconsin, died unknown in South Dakota, married William Freeman
Starbuck on 6 October 1900 in Illinois, USA
                          Edward Ollman - born April 1879 in Illinois
                          Clara Ollman - born July 1883 in Illinois
                          Louis Benjamin Ollman - born 14 May 1886 in
Illinois, died December 1968 in Illinois, married Clara
                          Pearl Ollman - born August 1889 in Illinois