Jakob married Magdalena M. Willig on 12 May 1896 in St. Michael's Church, Rochester, Monroe County, New York, USA. Magdalena (daughter of Michael Willig and Magdalena Kiefer) was born on 29 Apr 1875 in Bobenthal, Pfalz, Bayern; died on 7 Nov 1958 in Rochester, Monroe County, New York, USA; was buried on 11 Nov 1958 in Holy Sepulchre Cemetery, Rochester, Monroe County, New York, USA. [Group Sheet] [Family Chart]

1. Julius Jacob Klein was born on 16 Jun 1897 in Rochester, Monroe County, New York, USA; died on 13 Aug 1956 in Rochester, Monroe County, New York, USA.
2. Kathleen Catherine Klein was born on 10 Oct 1899 in Rochester, Monroe County, New York, USA; died on 25 Apr 1976 in Honeoye, Richmond, Ontario County, New York, USA.
3. Loretta Josephine Klein was born on 25 Dec 1901 in Rochester, Monroe County, New York, USA; died in 0Apr 1983 in Rochester, Monroe County, New York, USA.
4. Marie Barbara Klein was born on 11 Dec 1903 in Rochester, Monroe County, New York, USA; died in 0Feb 1974 in Rochester, Monroe County, New York, USA.
5. Magdalena Klein was born on 15 May 1906 in Rochester, Monroe County, New York, USA; died on 5 Feb 2002 in Spencerport, Monroe County, New York, USA.
6. Leo Cornelius Klein was born on 13 Dec 1909 in Rochester, Monroe County, New York, USA; died on 20 Mar 1967 in Rochester, Monroe County, New York, USA.
7. Joseph J. Klein was born on 13 May 1911 in Rochester, Monroe County, New York, USA; died on 1 Mar 1994 in Rochester, Monroe County, New York, USA.
8. Teresa K. Klein was born on 28 May 1914 in Rochester, Monroe County, New York, USA; died on 13 Oct 1996 in Rochester, Monroe County, New York, USA.

Jakob married Elisabetha Schwach. Elisabetha was born in 0Sep 1841 in Bas-Rhin, Alsace, France; died on 17 Mar 1905 in Rochester, Monroe County, New York, USA; was buried in Holy Sepulchre Cemetery, Rochester, Monroe County, New York, USA. [Group Sheet] [Family Chart]