Johannes married Maria Salomea Faul on 8 Feb 1774 in Pirmasens, Pfalz. Maria (daughter of Philipp Jakob Faul and Eva Katharina Kress) was born on 1 Jan 1753 in Pirmasens, Pfalz. [Group Sheet] [Family Chart]

1. Maria Katharina Heumach was born on 24 Jul 1774 in Pirmasens, Pfalz.
2. Georg Adam Heumach was born on 27 Jan 1777 in Pirmasens, Pfalz.
3. Johannes Georg Heumach was born on 11 Jan 1781 in Pirmasens, Pfalz; died in in Pirmasens, Pfalz.
4. Johannes Georg Heumach was born on 5 Nov 1783 in Pirmasens, Pfalz.
5. Johannes Heinrich Heumach was born on 6 May 1786 in Pirmasens, Pfalz; was christened on 9 May 1786 in Pirmasens, Pfalz.
6. Johannes Adam Heumach was born on 11 Jan 1790 in Pirmasens, Pfalz.