Johannes married Anna Margaretha Walter on 10 May 1786 in Edenkoben, Pfalz, Bayern. Anna (daughter of Johannes Adam Walter and Anna Margaretha Unknown) was born on 15 Aug 1765 in Klingenmünster, Pfalz, Bayern. [Group Sheet] [Family Chart]

1. Maria Eva Heilmann was born on 22 Oct 1792 in Edenkoben, Pfalz; died on 25 Dec 1814 in Edenkoben, Pfalz.
2. Anna Elisabetha Heilmann was born on 13 Mar 1796 in Edenkoben, Pfalz; died on 7 Apr 1855 in Edenkoben, Pfalz, Bayern.