Johannes married Maria Barbara Stoffel on 6 Feb 1725 in Pfalz, Bayern. Maria (daughter of Johannes Valentin Stoffel and Anna Maria Mehrenherd) was born on 1 May 1708 in Darstein, Pfalz; died on 8 Apr 1765 in Darstein, Pfalz. [Group Sheet] [Family Chart]

1. Susanna Margaretha Hartmann was born on 9 Feb 1726 in Darstein, Pfalz; was christened on 12 Feb 1726 in Darstein, Pfalz.
2. Andreas Hartmann was born on 1 Jan 1728 in Darstein, Pfalz, Bayern; was christened on 4 Jan 1728 in Darstein, Pfalz, Bayern; died on 7 Jun 1731 in Darstein, Pfalz, Bayern.
3. Franz Thomas Hartmann was born on 15 Jan 1730 in Darstein, Pfalz; was christened on 18 Jan 1730 in Vorderweidenthal, Pfalz.
4. Georg Friedrich Hartmann was born on 24 Feb 1732 in Darstein, Pfalz; died on 5 Apr 1772 in Darstein, Pfalz.
5. Maria Anna Margaretha Hartmann was born on 2 Nov 1735 in Darstein, Pfalz; was christened on 4 Nov 1735 in Darstein, Pfalz; died on 8 Jun 1793 in Darstein, Pfalz.
6. Georg Heinrich Hartmann was born on 27 Oct 1737 in Darstein, Pfalz, Bayern.
7. Georg Balthasar Hartmann was born on 12 Jan 1740 in Darstein, Pfalz, Bayern; died on 17 Jan 1770.
8. Susanna Christina Hartmann was born on 21 Feb 1743 in Darstein, Pfalz; was christened on 22 Feb 1743 in Annweiler am Trifels, Pfalz; died on 25 Aug 1782 in Vorderweidenthal, Pfalz.
9. Maria Elisabetha Hartmann was born on 17 Apr 1746 in Darstein, Pfalz; was christened on 20 Apr 1746 in Darstein, Pfalz; died on 16 Aug 1775 in Vorderweidenthal, Pfalz.
10. Maria Barbara Hartmann was born on 12 Feb 1749 in Darstein, Pfalz; was christened on 14 Feb 1749 in Vorderweidenthal, Pfalz.