1 Frederick WENZEL
Birth:         1827, Prussia
I believe I've found the passenger list for this family.  They arrived in May 1873 on the ship Prince Albert that departed Hamburg Germany and arrived in New York.
Spouse:        Minnie
Birth:         1830, Prussia
Marr:          abt 1850
Children:      Wilhelmine (Mary- Minnie) (1853-1912)
               August (1856-1933)
1.1 Wilhelmine (Mary- Minnie) WENZEL
Birth:         1853, Germany
Death:         20 Nov 1912, Montana
In the 1900 census she stated that she had come to the US in 1873.
Spouse:        George BATZ
Birth:         23 Feb 1831, Germany
Death:         10 Apr 1918, Montana
Father:        George BATZ (1807-1905)
Mother:        Margaretha RODER (1807-1876)
George and Wilhelmina are farming in Ela, Lake Co. Illinois in the 1880 census.
In the 1900 census they were living in Wauconda and George stated that he had immigrated to the US in 1860, that he had lived in the US for 40 years and was naturalized.
Marr:          18 Jun 1874, Cook, Il
Children:      Barbara (1875-1973)
               August Fried Johann (1877-)
               August George Johann (1879-1964)
               Emma Anna Margarethe (1882-1934)
               Margaret Dorothea (1890-1979)
               Son (1890-1890)
               Martha Maria (1893-1967)
1.2a August WENZEL*
Birth:         1856, Germany
Death:         Nov 1933, Arlington, Lake Co. Illinois
In the 1880 census Frederick and Emma both state that they are from Germany.
In the 1900 census, August and family are living in Chicago, Illinois.  August is in the orchestra.  Living with him are his parents Frederick and Minnie who state that they arrived in the US in 1873 while August states that he arrived in 1874.  In the 1920 census Albert and Emila (his second wife)??  Albert is a musician playing the Trombone.
Spouse:        Emma LUCHRING
Birth:         1856, Indiana with parents in Germany
Death:         1914
Marr:          3 Feb 1880, Cook Co. Illiois
Children:      Albert (1884-)
               Estella A. (1888-1969)
               Laura (1889-)
Other Spouses Amelia SASS
1.2b August WENZEL* (See above)
Spouse:        Amelia SASS
Death:         aft 1933
Other Spouses Emma LUCHRING