Joseph married Catharina Ossman about 1876 in Rochester, Monroe County, New York, USA. Catharina (daughter of Johannes Ossmann and Katharina Stephan) was born on 23 Dec 1850 in Rochester, Monroe County, New York, USA; was christened on 25 Dec 1850 in Saints Peter and Paul Church, Rochester, Monroe County, New York, USA; died on 22 Apr 1888 in Rochester, Monroe County, New York, USA; was buried in Rochester, Monroe County, New York, USA. [Group Sheet] [Family Chart]

1. William Lauer was born in 1877 in Rochester, Monroe County, New York, USA.
2. Edward F. Lauer was born in 0Apr 1879 in Rochester, Monroe County, New York, USA.
3. Ida Mary Lauer was born on 23 Jan 1881 in Rochester, Monroe County, New York, USA; died on 3 Mar 1937 in Rochester, Monroe County, New York, USA.
4. Bertha Barbara Lauer was born on 18 May 1884 in Rochester, Monroe County, New York, USA; died on 29 Oct 1952 in Brighton, Monroe County, New York, USA.