Johann married Emily Elizabeth Klein on 9 Apr 1911. Emily (daughter of Anton Klein and Anna Maria Mischler) was born on 22 Apr 1892 in Brooklyn, Kings County, New York, USA; died on 20 Jul 1979 in Pinellas County, Florida, USA. [Group Sheet] [Family Chart]

1. Howard John Happ was born on 8 May 1912 in New York, USA; died on 8 Jan 1985 in Chesterfield, Cheshire County, New Hampshire, USA.
2. Ethel C. Happ was born on 27 Mar 1914 in New York, USA; died on 11 Mar 2004 in Saint Petersburg, Pinellas County, Florida, USA.
3. Charlotte Alice Happ was born on 2 Oct 1915 in New York, USA; died on 25 Nov 1997 in Pinellas County, Florida, USA; was buried in Bay Pines National Cemetery, Pinellas County, Florida, USA.
4. Norman Louis Happ was born on 1 Oct 1919 in New York, USA; died on 27 Feb 1983 in Farmingdale, Nassau County, New York, USA; was buried in Long Island National Cemetery, Farmingdale, Suffolk County, New York, USA.
5. Edward Julius Happ was born on 26 Apr 1924 in Richmond Hill, Queens, Queens County, New York, USA; died on 19 Aug 2004 in Florida, USA; was buried in Forest Hills Memorial Park and Mausoleum, Palm City, Martin County, Florida, USA.
6. Marion Happ was born on 13 Oct 1927 in Richmond Hill, Queens, Queens County, New York, USA; died on 11 Aug 2010 in Florida, USA.