Johannes married Maria Anna Seibert on 29 May 1853 in Sullivan County, New York, USA. Maria (daughter of Joseph Seibert and Maria Magdalena Dahm) was born on 29 Aug 1831 in Erlenbach bei Dahn, Pfalz, Bayern; was christened on 30 Aug 1831 in Erlenbach bei Dahn, Pfalz, Bayern; died in in Callicoon, Delaware, Sullivan County, New York, USA . [Group Sheet] [Family Chart]

1. Louis Philip Hemmer was born on 6 Apr 1852 in Callicoon, Delaware, Sullivan County, New York, USA ; died on 4 Apr 1921 in Scranton, Lackawanna County, Pennsylvania, USA; was buried in St. Mary's Cemetery, Scranton, Lackawanna County, Pennsylvania, USA.
2. Francis Joseph Hemmer was born on 16 Aug 1853 in Callicoon, Delaware, Sullivan County, New York, USA ; died in 1924; was buried in St. George Roman Catholic Cemetery Cemetery, Jeffersonville, Sullivan County, New York, USA.
3. Mary Hemmer was born on 10 Jul 1857 in Callicoon, Delaware, Sullivan County, New York, USA ; died on 8 Nov 1918 in Scranton, Lackawanna County, Pennsylvania, USA.
4. Catherine Hemmer was born on 3 Aug 1860 in Callicoon, Delaware, Sullivan County, New York, USA ; died on 28 Feb 1946 in Sullivan County, New York, USA.
5. John Albert Hemmer was born on 27 Jun 1862 in Callicoon, Delaware, Sullivan County, New York, USA ; died on 22 Feb 1928 in Tioga County, Pennsylvania, USA.
6. Barbara E. Hemmer was born in 0Aug 1867 in Callicoon, Delaware, Sullivan County, New York, USA ; died on 29 Jan 1936 in Binghamton, Broome County, New York, USA.
7. Rosa Anna Hemmer was born in 1872 in Callicoon, Delaware, Sullivan County, New York, USA .